scholarly journals Effects of Cryospheric Change on Alpine Hydrology: Combining a Model With Observations in the Upper Reaches of the Hei River, China

2018 ◽  
Vol 123 (7) ◽  
pp. 3414-3442 ◽  
Author(s):  
R. Chen ◽  
G. Wang ◽  
Y. Yang ◽  
J. Liu ◽  
C. Han ◽  
...  
Keyword(s):  
Cryospheric Change ◽  
Alpine Hydrology

scholarly journals Partitioning the contributions of cryospheric change to the increase of streamflow on the Nu River

2021 ◽  
Vol 598 ◽  
pp. 126330
Author(s):  
Yuheng Yang ◽  
Baisha Weng ◽  
Denghua Yan ◽  
Yongzhen Niu ◽  
Yanyu Dai ◽  
...  
Keyword(s):  
Cryospheric Change ◽  
Nu River

Using InSAR to asses rock glacier movement in the Uinta Mountains, Utah

2020 ◽  
Author(s):  
George Brencher ◽  
Alexander Handwerger ◽  
Jeffrey Munroe
Keyword(s):  
Arid Regions ◽  
Interferometric Synthetic Aperture Radar ◽  
Rock Glacier ◽  
Uinta Mountains ◽  
Glacier Inventory ◽  
Rock Glaciers ◽  
Climatic Drivers ◽  
Glacier Velocity ◽  
Alpine Hydrology ◽  
Insight Into

<p>Rock glaciers are perennially frozen bodies of ice and rock debris that move downslope primarily due to deformation of internal ice. These features play an important role in alpine hydrology and landscape evolution, and constitute a significant water resource in arid regions. In the Uinta Mountains, Utah, nearly 400 rock glaciers have been identified on the basis of morphology, but the presence of ice has been investigated in only two. Here, I use satellite-based interferometric synthetic-aperture radar (InSAR) from the Copernicus Sentinel-1 satellites to identify and monitor active rock glaciers over a 10,000 km<sup>2 </sup>area. I also compare the time-dependent motion of several individual rock glaciers over the summers of 2016-2019 to search for relationships with climatic drivers such as precipitation and temperature. Sentinel-1 data from the August-October of 2016-2019 are used to create 79 interferograms of the entire Uinta range and are processed with the NASA/JPL/Stanford InSAR Scientific Computing Environment (ISCE) software package. Temporal baselines of intrayear interferograms range from 6-72 days. We use average velocity maps to generate an active rock glacier inventory for the Uinta Mountains containing 196 active rock glaciers. Average rock glacier velocity is 3 cm/yr in the line-of-sight direction, but individual rock glaciers have velocities ranging from 0.3-15 cm/yr. Rock glacier speeds do have a seasonal component, and were fastest in August across all years. One rock glacier reached a speed of 40 cm/yr over a 12 day interval from August 5 to August 17 of 2017. Preliminary results suggest that active rock glaciers are found at altitudes 10 m higher on average than inactive and relic rock glaciers identified in the previous inventory. Rock glacier movement did not accelerate between 2016 and 2019, suggesting that rock glaciers in this part of the Rocky Mountains are not speeding up over time. Our results highlight the ability to use satellite InSAR to monitor rock glaciers over large areas and provide insight into the factors that control their kinematics.</p>

scholarly journals Cryospheric Science: research framework and disciplinary system

2017 ◽  
Vol 5 (2) ◽  
pp. 255-268 ◽  
Author(s):  
Dahe Qin ◽  
Yongjian Ding ◽  
Cunde Xiao ◽  
Shichang Kang ◽  
Jianwen Ren ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Environmental Changes ◽  
Science Research ◽  
Social Adaptation ◽  
Research Framework ◽  
Research Areas ◽  
Traditional Research ◽  
Set Up ◽  
Disciplinary System ◽  
Cryospheric Change

Abstract Cryospheric changes and their impacts have received increasing concern, extending the research to include the interactions between earth spheres and the impacts of and social adaptation to cryospheric changes. As a result, Cryospheric Science is rapidly developing. However, the research framework of Cryospheric Science has not completely been set up, and the intension and extension of Cryospheric Science are unclear. Following a literature review, the research framework for Cryospheric Science and the discipline components are analysed in this paper. We consider that Cryospheric Science is an inevitable product of international research on the earth and environmental changes as well as on human sustainable development. It will not only strengthen the linkage between the cryosphere and other earth spheres by deepening traditional research areas, but will also bring more focus on the critical roles of the cryosphere in interactions between earth spheres, and will enhance the relationship between cryospheric change and climate, ecology, hydrology, surface environment and sustainable development. The disciplinary tree of Cryospheric Science is developed following the mainstream of change-impacts adaptation. The disciplines of Cryospheric Science were teased out against characteristics of traditional branches and the developing interdisciplinary branches of cryosphere elements, which will provide reference to Cryospheric Science as it systematically grows to maturity.

scholarly journals Vegetation phenology in Greenland and links to cryospheric change

2018 ◽  
Vol 59 (77) ◽  
pp. 59-68 ◽  
Author(s):  
Jeffery A. Thompson ◽  
Lora S. Koenig
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Greenland Ice Sheet ◽  
The Arctic ◽  
Growing Degree Days ◽  
Degree Days ◽  
Hydrologic Change ◽  
Moderate Resolution Imaging Spectroradiometer ◽  
Cryospheric Change ◽  
Dry Out

ABSTRACTRecent greening of vegetation across the Arctic is associated with warming temperatures, hydrologic change and shorter snow-covered periods. Here we investigated trends for a subset of arctic vegetation on the island of Greenland. Vegetation in Greenland is unique due to its close proximity to the Greenland Ice Sheet and its proportionally large connection to the Greenlandic population through the hunting of grazing animals. The aim of this study was to determine whether or not longer snow-free periods (SFPs) were causing Greenlandic vegetation to dry out and become less productive. If vegetation was drying out, a subsequent aim of the study was to determine how widespread the drying was across Greenland. We utilized a 15-year time-series obtained by the MODerate Resolution Imaging Spectroradiometer (MODIS) to analyze the Greenland vegetation by deriving descriptors corresponding with the SFP, the number of cumulative growing degree-days and the time-integrated Normalized Difference Vegetation Index. While the productivity of most vegetated areas increased in response to longer growing periods, there were localized regions that exhibited signs consistent with the drying hypothesis. In these areas, vegetation productivity decreased in response to longer SFPs and more accumulated growing degree-days.

scholarly journals Variability of atmospheric freezing-level height and its impact on the cryosphere in China

2011 ◽  
Vol 52 (58) ◽  
pp. 81-88 ◽  
Author(s):  
Yinsheng Zhang ◽  
Y. Guo
Keyword(s):  
Time Series Data ◽  
Southern Oscillation ◽  
Eastern China ◽  
Northern China ◽  
Spatial Inhomogeneity ◽  
Western China ◽  
Series Data ◽  
Freezing Level ◽  
Uniform Distributions ◽  
Cryospheric Change

AbstarctWe used atmospheric air-temperature data from the Chinese radiosonde network to analyze changes in freezing-level heights (FLHs) during the past 48 years and studied their impacts on the cryosphere. We examined radiosonde time-series data from 92 selected Chinese radiosonde network stations. Generally, FLH exhibited a latitudinal zone, declining from the south. The FLH trend during 1958–2005 showed spatial inhomogeneity, most uniform distributions during autumn, and significant upward trends. Temporal variability of FLH in eastern China was briefly associated with El Niño Southern Oscillation events, but the causes of FLH changes in western China require further investigation. FLH in western and northern China has mostly increased since 1958, and might be considered a possible indicator of cryospheric change during the second half of the 20th century. There were significant correlations between FLH and changes in snow cover, glaciers and permafrost.

scholarly journals APCC Data Report I: Black carbon and organic carbon dataset from atmosphere, glaciers, snow cover, precipitation, and lake sediment cores over the Third Pole

2021 ◽  
Author(s):  
Shichang Kang ◽  
Yulan Zhang ◽  
Pengfei Chen ◽  
Junming Guo ◽  
Qianggong Zhang ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Snow Cover ◽  
Black Carbon ◽  
Lake Sediment ◽  
Sediment Cores ◽  
Ice Cores ◽  
Water Soluble ◽  
Atmospheric Pollutants ◽  
The Third ◽  
Cryospheric Change

Abstract. The Tibetan Plateau (TP) and its surroundings, known as the Third Pole, play an important role in the regional and global climate and hydrological cycle. Carbonaceous aerosols (CAs), including black carbon (BC) and organic carbon (OC), can directly/indirectly absorb and scatter solar radiation, and change the energy balance on Earth. CAs, along with other atmospheric pollutants (e.g., mercury), can frequently be transported over long distances into the inland TP. During the last decade, a coordinated monitoring network and research program on Atmospheric Pollution and Cryospheric Change (APCC) has been gradually setup and continuously operated within the Third Pole regions to investigate the linkage between atmospheric pollutants and cryospheric change. This paper presents a systematic dataset of BC, OC, water soluble organic carbon (WSOC), and water insoluble organic carbon (WIOC) from aerosols (19 stations), glaciers (17 glaciers, including samples from surface snow/ice, snowpit, and two ice cores), snow cover (2 stations continuous observed, and 138 sites surveyed), precipitation (6 stations), and lake sediment cores (7 lakes) collected across the TP and its surroundings, as the first dataset released from this APCC program. These data were created based on online (in-situ) and laboratory measurements. High-resolution (daily scale) atmospheric equivalent BC (eBC) concentrations were obtained by using an aethalometer (AE-33) in the Mt. Everest (Qomolangma) region, which can provide a new insight into the mechanism of BC transportation over the Himalayas. Spatial distributions of BC, OC, WSOC and WIOC from aerosols, glaciers, snow cover, and precipitation indicated different features among the different regions of the TP, which were mostly influenced by emission sources, transport, and deposition processes. Several hundred years of refractory BC (rBC) records from ice cores and BC from lake sediment cores revealed the strength of human activities since the industrial revolution. BC isotopes from glaciers and aerosols identified the relative contributions of biomass and fossil fuel combustion to BC deposition on the Himalayas and TP. Mass absorption cross section of BC and WSOC from aerosol, glaciers, snow cover, and precipitation samples were also provided. This updated dataset is released to the scientific communities focusing on atmospheric science, cryospheric science, hydrology, climatology and environmental science. The related datasets are presented in the form of excel files. These files are available to download from the State Key Laboratory of Cryosphere Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences at Lanzhou  (https://doi.org/10.12072/ncdc.NIEER.db0114.2021, Kang and Zhang, 2021). In the future, datasets of mercury, heavy metals, and POPs will be reported.

Autonomous detection of cryospheric change with hyperion on-board Earth Observing-1

2006 ◽  
Vol 101 (4) ◽  
pp. 447-462 ◽  
Author(s):  
T. Doggett ◽  
R. Greeley ◽  
S. Chien ◽  
R. Castano ◽  
B. Cichy ◽  
...  
Keyword(s):  
Cryospheric Change ◽  
Autonomous Detection

scholarly journals Initial estimate of the contribution of cryospheric change in China to sea level rise

2011 ◽  
Vol 56 (16) ◽  
pp. 1661-1664 ◽  
Author(s):  
JiaWen Ren ◽  
BaiSheng Ye ◽  
YongJian Ding ◽  
ShiYin Liu
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Initial Estimate ◽  
Cryospheric Change
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