Instead, the terrace failure shown in Fig 10b is an example of r

Instead, the terrace failure shown in Fig. 10b is an example of restoring and rebuilding of the walls, steps, and cisterns of an old terraced landscape originally planted with lemon trees that will be used as a vineyard. However, the collapse observed in Fig. 10b is indicative of the loss of local lore (oral communication) in building retaining stone walls and of the importance to properly regulate overland flow. The

literature review proposed in Section 1 and the practical examples described in Section 2 underline how human actions connected to the presence and maintenance CX 5461 of terraced structures are capable of accelerating or diverting natural events such as landslides and land degradation. Connected to

these issues, the following section is divided in three parts: first are the non-structural management suggestions for the correct management of terraces; second are the structural measures to be implemented for the management of the dry-stone walls; third are the new remote sensing technologies, such as Airborne Laser Scanner (ALS) and Terrestrial Laser Scanner (TLS), for managing the critical issues related to the terrace landscapes, especially to better understand the surface drainage paths, which is a future challenge for terrace landscape management and planning. ON 1910 During the last century, the agriculture system has changed deeply with an increase in productivity.

The maintenance Selleck Y-27632 of terraced structures became problematic due to the hard mechanization of these areas and the reduction of people in agriculture (Mauro, 2011). The rapid disappearance and undermanagement of the traditional terraced agricultural landscapes became a worldwide concern, and how to balance the needs between conservation and development has become a major policy issue. Non-structural management approaches have begun worldwide. In 2002, the Food and Agriculture Organization of the United Nations (FAO) launched the Globally Important Agricultural Heritage Systems (GIAHS) project, with the aim of mobilizing global awareness and support for dynamic conservation and adaptive management of agricultural systems and their resulting landscapes (Dela Cruz and Koohafkan, 2009). The cultural importance of the terraces was also underlined by UNESCO, which over the years has started projects for the management of world heritage sites of terraced areas (i.e., the Honghe Hani Rice Terraces in China, the Wachau Cultural Landscape in Austria, the Konso Cultural Landscape in Ethiopia, the Upper Middle Rhine Valley in Germany, the Tokaj Wine Region in Hungary, the Cinque Terre and Costiera Amalfitana in Italy, the Rice Terraces of the Philippine Cordilleras in the Philippines, the Alto Douro Wine Region in Portugal and the vineyard terraces of Lavaux in Switzerland).

Some studies on the western Alps, for example, show that repeated

Some studies on the western Alps, for example, show that repeated prescribed burning with a short fire return

interval may have negative effects on fauna ( Lemonnier-Darcemont, 2003 and Lyet et al., 2009), and favour alien vegetation encroachment in the short-term ( Lonati et al., 2009). Fire has been a driver of landscape evolution and a mirror of human activities in the Alpine region. This review paper is intended to assist in creating and shaping the future through understanding fire history of the Alps and its fire traditions, as well as its specificities. Due to vulnerability of high mountain environments, the Alpine vegetation can be used as an indicator for global change and climate warming in particular (Pauli et al., 2003). For example, the UMI-77 in vivo advent of a new generation of large wildfires at the Alpine belt could mirror a more general trend towards increasing global warming. The climate warming recorded in the Alpine region from 1890 to 2000 results in double the one assessed at global level (Böhm et al., 2001); the environmental impact brought by a further increase of air temperature might lead to very serious consequences, e.g., affecting the water cycle, the occurrence of avalanches, floods and landslides, the ecological heritage, NLG919 cell line the vertical shift of the tree line (Grace et al., 2002), and worsening fire

severity. In this key, the role of the Alps in monitoring climate change evolution is particularly valuable in investigating potential human-induced, and human-affecting, developments, so strictly associated to the Anthropocene. Current global processes, chiefly climate and land use Phosphoprotein phosphatase changes, suggest that a complete removal of such

a disturbance from the Alpine area is neither feasible nor advisable. Consequently, we are likely to be forced again to live with fire and to apply traditional knowledge to the principles of fire – and land – management, namely creating resilient landscapes, adapted communities and adequate fire management policies (Dellasala et al., 2004). The unevenness of human population density in the Alpine region is a key issue in defining ad hoc management strategies. On the one hand, land abandonment of marginal areas, alongside climate anomalies, is leading to a new generation of unmanageable large fires (third fire generation sensu Castellnou and Miralles, 2009), where lack of accessibility and fuels build-up are the main constraints, with a greater effect than the often blamed climate change. This will pose a challenge in the future, for instance when shrinking government budgets might result in less capacity of fire services. Furthermore, unbalanced fire regimes such as fire exclusion or very frequent surreptitious use of fire could determine a loss of both species richness and landscape diversity, as it is happening with alpine heathlands ( Lonati et al., 2009 and Borghesio, 2014). Using planned fire for land management and fire prevention ( Fernandes et al.

It has been shown that in subjects who were treatment-naïve or pr

It has been shown that in subjects who were treatment-naïve or previously treated with alendronate, transitioning to denosumab treatment was associated with greater gains in BMD and decreases in bone turnover markers when compared with subjects continuing on alendronate treatment [9] and [10]. It is not known whether this observation would be similar with other bisphosphonates, which is an important consideration for women or their physicians who are considering a change in therapy due to unsatisfactory treatment effect. The purpose of this randomized, open-label trial was to compare the safety and efficacy of transitioning to denosumab or the bisphosphonate risedronate

for 12 months, in postmenopausal women who were previously treated with daily or weekly alendronate and were considered to be suboptimally APO866 order adherent to their current therapy. This 12-month, multicenter, international (82 centers in Europe, Australia, and Canada), randomized, open-label, parallel-group study was conducted in postmenopausal women who had previously been prescribed alendronate therapy, but had either stopped taking alendronate or were currently taking alendronate, but demonstrated suboptimal adherence to treatment. Subjects were randomized 1:1 to receive either denosumab 60 mg subcutaneously (SC) every GSI-IX mouse 6 months (Q6M) or risedronate orally (PO) 150 mg once

monthly (QM, one 75 mg tablet on each of 2 consecutive days) for 12 months. The protocol specified that all subjects were required to take daily supplements of most ≥ 1000 mg elemental calcium and ≥ 800 IU vitamin D during the study. Ambulatory, postmenopausal women aged ≥ 55 years were eligible if they had been previously prescribed alendronate therapy, with the first daily or weekly alendronate prescription ≥ 1 month prior to screening, without limitation of alendronate treatment duration. All subjects provided signed informed consent prior to initiation of any study procedure. With a 1:1 randomization ratio, a sample size of 362 evaluable subjects in each treatment group would give > 90% power to detect a difference

> 1% at the total hip BMD at 12 months using a two-sided t-test at the 5% significance level, assuming a common standard deviation (SD) of 2.65%. Assuming a dropout rate of 10% in 12 months, the planned enrollment was 400 subjects in each treatment group, with a total sample size for the study of approximately 800 subjects. To be eligible to participate in this study, the subject must have either stopped oral alendronate therapy before the screening visit, or was still taking oral alendronate therapy (no washout period) with low adherence, which was assessed by a score of < 6 on the Osteoporosis Specific Morisky Medication Adherence Scale (OS-MMAS). The OS-MMAS is an osteoporosis-specific version of the MMAS, an 8-item questionnaire that has been evaluated for reliability and validity [11]. Each of the 8 items captures a specific medication-taking behavior.

Perhaps, it could be the result of the paradigm shift in the way

Perhaps, it could be the result of the paradigm shift in the way protein purification is carried out. In early times, protein purification protocols invariably used to be multi-step processes. They followed a more or less set sequence of unit processes: precipitation→ion exchange chromatography→gel filtration→(another exchange chromatography)→affinity chromatography (Gupta, 2002). These multi-step protocols

raised the cost of production of a protein to the point where the downstream component could constitute >80% of the overall production costs (Przybycien et al., 2004). Many strategies have been developed over the years to reduce the cost of protein purification (Przybycien et al., 2004). These efforts have been multi-disciplinary in nature. Biochemical engineers and material scientists have contributed a lot to these developments. The latter discipline, for example, is providing nanomaterials which can be used as support http://www.selleckchem.com/products/ly2157299.html for separation of enzymes (Bucak et al., 2003 and Ditsch et al., 2006). Some key trends have been: • Integration

of upstream and downstream components (Gupta and Mattiasson, 1994 and Mondal et al., 2006). As most of proteins or enzymes are produced by recombinant route, protein selleck chemicals purification has increasingly come to be viewed, at least in the academic sector, simply as use of an affinity tag along with the corresponding affinity media. Furthermore, this is generally carried out by using a commercial kit. If one does not work, another one is tried! Simultaneously, the older view of using multiple criteria for establishing the purity of a protein has been replaced by being satisfied with a single band on SDS-PAGE. This often aminophylline can lead to an unsatisfactory situation. The older approach of evaluating protein purity by PAGE carried out at at least

two widely different pH values, and ultra centrifugal analysis was much more sound. What is more, there are many ambiguities associated with the way SDS-PAGE is carried out and there does not seem to be an agreement (one is generally at the mercy of the wisdom of the peer review). How much “pure protein” should be loaded as compared to the crude protein preparation lane? Some people advocate equal amount of protein in both lanes. If the crude has 10% of the desired protein; the “pure protein” lane ends up having a 10-fold more intense band. Some people during peer review have a problem with that especially since more often than not the “pure protein” in such cases would show a rather broad band. What may be desirable is to load two or more widely different concentrations of proteins 0.5×, 1×, 2× (depending upon how crude the starting material was). One of the bands of the pure protein should be sharp and intense; another should be an “overload” to ensure that all significant traces of impurities can be detected. Coomassie Blue stain seems to be widely accepted “gold standard”.

(1993) They consisted of a vial (3 L) with the fungus garden con

(1993). They consisted of a vial (3 L) with the fungus garden connected to a foraging arena and were maintained at 25 ± 2 °C with a relative humidity of 75 ± 5% and a 12:12 light:dark regime. On a daily basis, the ants received fresh leaves of Ligustrum japonicum Thumb, Tecoma stans L., Acalypha wilkesiana Müll Arg and Rosa spp., in addition to clean water. The encapsulation response depends on humoral and cellular

factors, and the cellular defense system is coupled with humoral defense in the melanization Sunitinib in vivo of pathogens. Thus, the encapsulation rate assay provides an accurate measure of immunocompetence, which is defined as the ability to produce an immune response (Ahtiainen et al., 2004 and Rantala and Kortet, 2004). We used three 3-year-old colonies (A, B, and C) for measuring the encapsulation rate of A. subterraneus subterraneus

workers. Three groups of workers of similar size (approximately 2.4 mm of head capsule width) were defined based on their nest location (internal/external) and the extent of actinomycetes covering their cuticle (clearly visible/not visible): (1) external workers without visible bacteria covering the body (EXT), (2) internal workers with bacteria covering the whole body (INB) and (3) internal workers without visible bacteria covering the whole body (INØ). Considering the wide variation Selleck PR 171 in bacterial coverage of the ants, we have chosen two distinct worker classes. INB workers referred to those whose head, thorax and gaster were entirely covered with bacteria from a top view. This pattern corresponds to ‘score 12’ (maximum) established and used by Poulsen et al. (2003a). From a top view, the EXT and INØ workers exhibited no coverage of bacteria on the head, thorax and abdomen. Insertion of an artificial antigen in the hemocoel provokes its encapsulation, and this method has been frequently used to evaluate insect immunity ( de Souza et al., 2009, de Souza et

al., 2008, Fytrou et al., 2006, Lu et al., 2006, Sorvari et al., 2008 and Vainio et al., 2004). We measured the encapsulation response by inserting an inert antigen, a 1.5 mm-long piece of a sterile nylon monofilament (0.12 mm diameter), into each ant’s thorax between the second and third leg pairs. Vasopressin Receptor After introduction of the antigen, the workers were individually placed in glass test tubes. The tubes were maintained in an incubator at 25 °C, 75% RH, in the dark. This procedure was carried out on 10 workers from each colony, with a total of 30 workers for each group. Twenty-four hours later, the implants were removed from the hemocoel and placed on a glass slide to be mounted in Entellan© medium. Nylon monofilament was examined under a light microscope and photographed using a digital camera (Axioskop 40 Zeiss microscope).

1 ± 23 2 SFU/106 cells; Life Technologies: 338 9 ± 21 3 SFU/106 c

1 ± 23.2 SFU/106 cells; Life Technologies: 338.9 ± 21.3 SFU/106 cells, n = 9 (Supplementary Fig. 2D)). Following intranasal infection of Line O birds with LPAI H7N7, buccal swab samples were analyzed for the presence of influenza M1 transcript

by qRT-PCR. These were found to be positive from the earliest sampling time point at day 4 post-infection. Viral transcript was still detectable albeit at a lower level (p < 0.05) in the buccal swabs at day 6, and was undetectable at day 10 (data not shown). Challenged birds exhibited significantly higher HI titers compared to non-infected controls (Fig. 1A, p < 0.01). All subsequent experiments were performed in Line O birds, with the exception of the vaccine cohort (Line 15, final figure). We tested our antibody AZD6738 cell line pair for use in ELISpot with live or beta propiolactone inactivated

challenge-strain virus to stimulate splenocyte responses (Fig. 1B). Splenocytes from control (non-infected) birds did not produce IFNγ when exposed to either live or inactivated virus. In contrast, splenocytes from infected birds did produce IFNγ (p < 0.05) following exposure to both live (72.0 ± 15.4 SFU/106 cells) and inactivated virus (155.2 ± 42.3 SFU/106 cells), as expected. The use of live virus consistently yielded lower responses than the use of inactivated virus in all samples, although this difference was not statistically significant. To identify epitope-specific responses, we employed an NP peptide library corresponding to FG-4592 research buy the challenge virus. We analyzed responses to pooled peptides at 1 week post-infection (Supplementary Fig. 3) and to individual peptides 2 weeks after infection (Fig. 1C). Responses to individual peptides were low, not consistent between birds, and not statistically significantly different between control and infected birds. In the following experiments, an alternative strategy to detect specific IFN responses was developed. To potentiate the detection of influenza-specific CD8 T cell responses,

we generated a CKC cell line expressing only MHC class I. We passaged CKC from Line O birds a minimum of eight times. We then analyzed the cells by flow cytometry for the expression of MHC classes I and II. The passaged CKC were second found to exclusively express MHC class I (Fig. 2). Having validated the necessary individual components we introduced the method of co-culture of responding cells with infected CKCs. Despite the fact that so many antigen specific cells were detectable in co-culture with infected CKCs, the background response for this assay was extremely low (control and INFγ only data, Fig. 3), demonstrating its specificity and sensitivity. Splenocytes from infected birds (2 weeks post-infection) produced extremely high (mean: 833 ± 134 SFU/106 cells) numbers of spot forming units when co-cultured with infected CKC (Fig. 3). This response was significantly different (p < 0.

78, P = 038; r = 0 69, P = 042, respectively; Figures 5A and 6A

78, P = .038; r = 0.69, P = .042, respectively; Figures 5A and 6A). Trastuzumab has been used

in the treatment of Her-2–positive metastatic breast cancer over one decade [4], [7] and [8]. Although it has great affinity for Her-2 and low toxicity, about 70% of patients do not respond to this treatment [12]. Therefore, early identification of patients who would benefit from trastuzumab can avoid additional cost for patients [6]. Traditional imaging and fluorescent in situ hybridization have been viewed as the “gold standard” techniques for predicting the treatment response, but they are expensive and not real-time systems [4], [13] and [14]. Our study intended to investigate the usage of ultrasound molecular imaging techniques to evaluate the response to trastuzumab Tanespimycin therapy in Her-2–positive breast cancer in the tumor xenograft selleck inhibitor model. Dynamically monitoring the tumor inner change, such as tumor cell apoptosis during treatment, could be an early indicator of breast cancer response to trastuzumab [15]. An apoptosis marker, Annexin V, has been labeled with FITC and coupled to magnetic nanoparticles to identify apoptotic

cells [22] and [24]. In addition, there were various methods to design targeted apoptosis probes to detect tumor cell apoptosis. Previous studies used biotin/streptavidin interactions to conjugate targeting ligands, such as αvβ3 integrin, P-selectin, or vascular endothelial Interleukin-2 receptor growth receptor 2, to image tumor angiogenesis,

or to evaluate the antiangiogenic therapy response of tumors [16], [17] and [18]. In our targeted apoptosis NB design, streptavidin-based bubbles binding to biotin–Annexin V were also used to dynamically detect tumor apoptotic cells during treatment in vitro and in vivo. These targeted bubbles with nanolevel diameters (less than 600 nm) can easily pass through the gaps between the tumor’s new microvascular endothelial cells (865 ± 5.2 nm, tested in the preparatory study) to adhere to the surface of tumor apoptotic cells in our tumor xenograft model. In the imaging study, we tested signals of NBs at 60 minutes after the injection. According to previous reports [17] and [19], it would be of enough time for bubbles to bind to tumor cells through vessels. Thus, it is possible for us to use these targeted NBs to detect tumor apoptotic cells in vivo. First, for seeking the binding ability of targeted NB with targeted cells in vitro, we found that NB–Annexin V bound to trastuzumab-treated cells significantly better than to control (buffer-treated) cells, which is confirmed by DAPI-stained nucleus test and caspase-3–positive expression. After preparing the breast cancer–bearing mice, we performed ultrasound targeted imaging to assess the early response to anti–Her-2 drugs in breast cancer.

7 ± 15 0 and 17 4 ± 8 0% respectively) The GFP+ fraction in the

7 ± 15.0 and 17.4 ± 8.0% respectively). The GFP+ fraction in the adjacent tissue of the skin was significantly larger than in the adjacent tissue of the mucoperiosteum (p = 0.004). The fraction of myofibroblasts (Fig. 3B) in the mucoperiosteal wounds (46.4 ± 23.8%) was

larger than in the adjacent tissue (0.69 ± 0.53%; p = 0.002) but also larger than in the skin wounds (7.3 ± 7.1%; p = 0.012). In contrast, the fraction of myofibroblasts in skin wounds and adjacent tissue was similar. The fraction of GFP-positive myofibroblasts ( Fig. 3C) in the mucoperiosteal wounds (4.6 ± 3.0%) was larger than in the adjacent tissue (0 ± 0%; p = 0.023), which was not the case in skin wounds and adjacent tissue. The fraction of activated fibroblasts (Fig. 3D) in the skin wounds (78.5 ± 4.7%) was slightly larger than in the TSA HDAC cell line adjacent tissue (64.6 find protocol ±7.4%, p = 0.010). The slight difference in the mucoperiosteum was not significant. The fraction of GFP-positive activated fibroblasts tended to be larger in both types of wound tissues than in the adjacent tissues (

Fig. 3E). The fraction of macrophages (Fig. 3F) was not significantly different in all tissues. The mucoperiosteal adjacent tissue (7.5 ± 5.7%) and the skin adjacent tissue (16.1 ± 6.2%) contained similar numbers of macrophages. No significant differences were found in the fraction of GFP-positive macrophages (Fig. 3G). We hypothesized that more BMDCs are recruited to quickly healing tissues such as the oral mucosa than

to more slowly healing tissues such as the skin. This was based on earlier data obtained from regenerating endometrium of the human uterus where up to 48% of the epithelial cells are derived from the bone marrow.26 However, later it was shown in some mouse models that the contribution was far less.27 This is probably due to differences in the process of endometrial regeneration between humans and rodents. Previous studies indicate that about 14% of the cells in skin wounds in mice are derived from the bone marrow, and that this is increased by wounding.28 Our data show that about Teicoplanin 8% of the cells in mucoperiosteal wounds is recruited from the bone marrow, which is about 10 times higher than in the normal adjacent tissue. In contrast, the recruitment of BMDCs to skin wounds and the adjacent normal tissue is comparable, but about twofold larger than in mucoperiosteal wounds. Moreover, the total population of BMDCs in normal skin is about 25 times larger than in normal mucoperiosteum. Our data indicate that, in the mucoperiosteum, BMDCs are preferentially recruited to the wound but not in the skin. Alternatively, BMDCs recruitment in skin wounds might have peaked earlier than two weeks after wounding as reported in a mouse model.28 The long-term contribution of BMDCs, however, was similar to our findings. In the light of tissue remodelling and scarring, this might be the more relevant population.

In many regions aerosol-cloud interactions are perturbed by incre

In many regions aerosol-cloud interactions are perturbed by increasing amounts of anthropogenic aerosol particles.

In this respect, changes in cloud albedo, cloud lifetime and the amount of precipitation exert the greatest influence. For Europe knowledge about the emissions and concentrations of air pollutants, and in particular information on aerosols and their precursor gases, is quite comprehensive. In addition, measurements and model calculations indicate the strong variability of this pollution plume owing to changing emissions, chemical transformations, deposition and long-range transport of manifold species, all depending on season and weather type (see e.g. Eliassen and Saltbones, 1983, Krüger and Tuovinen, 1997, EMEP – The European Monitoring and Programme, GSI-IX in vivo 2004, Schaap et al., 2004, Van Dingenen et al., 2004 and Putaud et al., 2004). During the late 1980s, enormous amounts of particulate matter and aerosol precursor gas emissions, such Ibrutinib nmr as sulphur dioxide, nitrogen oxides and ammonia, made a strong contribution to the aerosol load over Europe. The extraordinarily

high sulphur dioxide emissions in the former German Democratic Republic (GDR), which amounted to even more than 5 Tg per year, were of major importance to secondary aerosol particle formation. The sizeable contributions from elevated point sources around Halle, Leipzig and Cottbus resulted in pronounced spatial differences of sulphur dioxide (SO2) and particulate matter (PM) concentrations in air. Such an increase in air pollution lead to reduced extinction and altered cloud optics. In Germany Liepert & Kukla (1997) found a statistically significant decrease in the mean annual surface global solar radiation between 1964 and 1990 under completely overcast skies. Lepirudin This result can be potentially explained by an increase in cloud optical thickness, changing cloud types, or by human impact on aerosol cloud-mediated processes. The collapse of the Eastern Bloc in 1989 led to significant reductions in industrial activities and thus atmospheric pollution.

A pronounced declining trend was observed in the so-called ‘Black Triangle’; this name refers to the enormous damage to human health and ecosystems caused by soot. This area, covering the southern part of Saxony (Germany), northern Bohemia (Czech Republic) and south-western Lower Silesia (Poland), is a prominent example of the extensive use of lignite deposits in Europe. Stjern et al. (2011) analysed the visibility changes in the ‘Black Triangle’ between 1983 and 2008. They confirmed that the strong reductions in SO2 and PM emissions in central Europe, i.e. a 90% decrease of SO2 emissions and a 72% decrease of measured sulphate concentrations, improved the mean horizontal visibility in the ‘Black Triangle’ from 11 to 27 km between 1983 and 2008.

The width of the border was determined on the basis of numerical

The width of the border was determined on the basis of numerical experiments for a cloud base height of 1.8 km, the highest cloud height value used in the study. The topography of the working area is presented in Figure 1. The latest updates of glacier front locations on the 1:100 000 maps of Svalbard come from 1990 for the northern coast of the Hornsund fjord and from 1961 for the southern coast; the updates for the Werenskioldbreen area are from 2002 (Werenskioldbreen and surrounding areas 2002). In this work the majority of glacier

borders in the domain and the coastline were updated on the basis of a composed ASTER image CAL-101 nmr (individual images from 2004 and 2005, projection UTM 33X, ellipsoid WGS 84, Błaszczyk et al. 2009). Based on digitized maps of Svalbard and the composed ASTER image, a dominant surface type was attributed to each grid cell: sea, glacier or tundra/rock (Figure 2). Two surface scenarios were used: ‘summer’ and ‘spring’. In both cases the fjord and ocean are ice-free to maximize albedo contrast between the land and the sea. A flat water surface and specular this website reflection of photons from the water surface are assumed. Regardless of the land cover, the land surface is assumed to act as a Lambert reflector. The real bidirectional scattering functions are anisotropic, but previous simulations showed that the error

introduced by this assumption is negligible in flux simulations (Rozwadowska & Cahalan 2002). Albedo values for MODIS channels 1–7 for tundra, glacier ice and snow were taken from MODIS albedo products for a white sky: the 105th day of Tyrosine-protein kinase BLK 2007 for the spring case with ‘winter-like’ snow and the 225th day of 2006 for the summer with a minimum albedo. The surface distributions of the actual white sky albedo (images) could not be used directly because the images were partly cloudy. Therefore, modal values of albedo frequency distributions were adopted as representative of a given surface type. The lower and higher parts of glaciers as well as coastal tundra

and mountains were treated separately. The height of separation (division) between the lower and higher parts of glaciers as well as between the coastal tundra and mountains was determined from dependences of the albedo on terrain elevation, obtained from MODIS images. The height of separation was set at 150 m. The spectral albedo of selected types of surface used in the modelling is given in Figure 3. In early spring, all the land is covered with snow. The coastal tundra, however, shows a lower albedo than the glaciers and mountains. Snow on the coast is transformed, and in some places it may be blown away, leaving the ground covered with ice. The albedo of snow-covered glaciers and mountains is slightly lower than that of fresh snow (cf.