Surface albedo partitions the amount of energy received by glacier surfaces from shortwave fluxes and modulates available for melt processes. The ice-albedo feedback, influenced contamination bare-ice with light-absorbing impurities, plays a major role in melting mountain glaciers warming climate. However, little is known about spatial temporal distribution variability surface under changing conditions. In this study, we focus on two located western Swiss Alps perform cross-comparison...

Climate change over High Mountain Asia (HMA, including the Tibetan Plateau) is investigated period 1979–2014 and in future projections following four Shared Socioeconomic Pathways: SSP1-2.6, SSP2-4.5, SSP3-7.0 SSP5-8.5. The skill of 26 Coupled Model Intercomparison Project phase 6 (CMIP6) models estimated for near-surface air temperature, snow cover extent total precipitation, 10 them are used to describe their until 2100. Similarly previous CMIP models, this new generation general...

Abstract. Although worldwide inventories of glacier area have been coordinated internationally for several decades, a similar effort ice thicknesses was only initiated in 2013. Here, we present the third version Glacier Thickness Database (GlaThiDa v3), which includes 3 854 279 thickness measurements distributed over roughly 3000 glaciers worldwide. Overall, 14 % global is now within 1 km measurement (located on same glacier) – significant improvement GlaThiDa v2, covered 6 and 1100...

One of the grand challenges in glacier research is to assess total ice volume and its global distribution. Over past few decades compilation a world inventory has been well-advanced both institutional set-up spatial coverage. The restricted surface observations. However, although thickness observed on many glaciers caps around globe, it not yet published shape readily available database. Here, we present standardized database observations compiled by an extensive literature review from...

The Tien Shan and Pamir mountains host over 28,000 glaciers providing essential water resources for increasing demand in Central Asia. A disequilibrium between climate affects meltwater release to Asian rivers, challenging the region's availability. Previous research has neglected temporal variability. We present glacier mass balance estimates based on transient snowline geodetic surveys with unprecedented spatiotemporal resolution from 1999/00 2017/18. Our results reveal heterogeneity...

Abstract Large numbers of small valley glaciers on Svalbard were thicker and more extensive during the Little Ice Age (LIA), demonstrated by prominent ice-cored moraines up to several kilometres beyond present-day margins. The majority these have since experienced a long period strongly negative mass balance 20th century are now largely frozen their beds, indicating they likely undergone thermal transition from polythermal cold-based regime. We present evidence for such switch reconstructing...

Abstract. Albedo feedback is an important driver of glacier melt over bare-ice surfaces. Light-absorbing impurities strongly enhance rates but their abundance, composition and variations in space time are subject to considerable uncertainties ongoing scientific debates. In this study, we assess the temporal evolution shortwave broadband albedo derived from 15 end-of-summer Landsat scenes for areas 39 large glaciers western southern Swiss Alps. Trends crucially depend on spatial scale...

Abstract Siberia experienced a prolonged heatwave in the spring of 2020, resulting extreme summer drought and major wildfires North-Eastern Siberian lowland tundra. In Arctic tundra, plants play key role regulating land surface energy budget by contributing to cooling through evapotranspiration. Yet we know little about how conditions impact tundra plant communities, potentially high air temperatures positive plant-mediated feedback. Here used high-resolution temperature vegetation maps...

Human body core temperature is tightly regulated within approximately 37 °C. Global near surface has increased by over 1.2 °C between 1850 and 2020. In light of the challenge this poses to human thermoregulation, present perspective article sought provide an overview on effects varying ambient cognitive, affective, behavioural domains functioning. To end, observational experimental studies in healthy individuals with mental disorders was provided. Within at °C, relatively lower skin...

ABSTRACT Albedo is an important parameter in the energy balance of bare-ice surfaces and modulates glacier melt rates. The prolongation ablation period enforces albedo feedback highlights need for profound knowledge on impacts mass balance. In this study, we assess sensitivity 12 Swiss glaciers with abundant long-term in-situ data changes albedo. We use pixel-based derived from Landsat 8. A distributed mass-balance model applied to 1997–2016 experiments are performed impact Our results...

Abstract The Greenland Ice Sheet harbours a wealth of microbial life, yet the total biomass stored or exported from its surface to downstream environments is unconstrained. Here, we quantify abundance and cellular flux within near-surface weathering crust photic zone western sector ice sheet. Using groundwater techniques, demonstrate that interstitial water flow slow (~10 −2 m d −1 ), while cytometry enumeration reveals this pathway delivers 5 × 10 8 cells supraglacial streams, equivalent...

Abstract. Long-term monitoring of snow cover is crucial for climatic and hydrological studies. The utility long-term snow-cover products lies in their ability to record the real states earth's surface. Although a long-term, consistent product derived from ESA CCI+ (Climate Change Initiative) AVHRR GAC (Advanced Very High Resolution Radiometer global area coverage) dataset dating back 1980s has been generated released, its accuracy consistency have not extensively evaluated. Here, we validate...

Abstract Knowledge about the distribution and dynamics of seasonal snow cover (SSC) is high importance for climate studies, hydrology or hazards assessment. SSC varies considerably across Hindu Kush Himalaya both in space time. Previous studies focused on regional investigations influence melt local hydrological system. Here, we present a systematic assessment metrics to evaluate entire HKH at basin scale based AVHRR GAC data 0.05° spatial daily temporal resolution. Our findings are unique...

We have investigated the source and role of light-absorbing impurities (LAIs) deposited on glaciers Olivares catchment, in Central Chile. LAIs can considerably darken (lowered albedo) glacier surface, enhancing their melt. combined chemical mineralogical laboratory analyses surface ice core samples with field-based spectral reflectance measurements to investigate nature properties such LAIs. Using remote sensing-based albedo maps, we upscaled local information glacier-wide coverage. then...

Abstract. In recent years, firn and summer snow cover has decreased on Alpine glaciers, exposing larger areas of ice at higher elevations. This reduces albedo leads to increased melt. To understand mass loss in former accumulation under conditions rapid glacier recession, it is important constrain the possible range newly free regions, duration exposure, albedo-ablation connection. We combine data from an on-ice weather station (3492 m.a.s.l.), ablation stakes, remote sensing derived provide...

Glacier albedo is a key driver of glacier energy and mass balance. In recent years, multi-annual firn summertime snow cover has decreased on Alpine glaciers, exposing larger areas ice at increasingly high elevations. This reduces contributes to feedback mechanisms that lead increased melt. To understand better predict loss in former accumulation under conditions rapid recession, it important constrain the possible range occurs these newly free regions, duration exposure, correlation causal...

The effects of climate change on mental health are far from being fully understood. aim this study was to investigate potentially beneficial warm ambient temperatures psychological well-being and during cold seasons. High-resolution data 156 meteorological stations were matched with representative survey stress, loneliness, affect, life satisfaction, self-reported N = 8,017 individuals. analyses revealed that higher associated lower perceived stress levels (14-day lag: ß=-0.151, p .033;...

An abstract is not available for this content so a preview has been provided. As you have access to content, full PDF via the 'Save PDF' action button.

Lake thermal dynamics provide critical insights into regional and global climate change, play a regulatory role in lake biogeochemical cycles. In situ measurements, remote sensing, hydrodynamic modelling are key sources for monitoring temperature. data essential calibration validation (cal/val) of satellite products numerical models, but often scarce or irregular many lakes. Additionally, assimilation surface water temperature (LSWT) can improve models. Satellite imagery has been widely used...

Abstract. AVHRR Global Area Coverage (GAC) data provide daily global coverage of the Earth, which are widely used for environmental and climate studies. However, their geolocation accuracy has not been comprehensively evaluated due to difficulty caused by onboard resampling resulting coarse resolution, hampers usefulness in various applications. In this study, a correlation-based patch matching method (CPMM) was proposed characterize quantify geo-location at sub-pixel level satellite with...

The routing and storage of meltwater the configuration drainage systems in glaciers exert a profound influence on glacier behaviour. However, little is known about hydrological cold glaciers, which form significant proportion total population climate sensitive region High Arctic. Using glacio-speleological techniques, we obtained direct access to explore survey three conduit one moulin within tongue area Tellbreen, small cold-based valley central Spitsbergen. More than 600 m conduits were...