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Melt Water Retention Processes in Snow and Firn on Ice Sheets and Glaciers: Observations and Modeling

Authors: --- --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889456192 Year: Pages: 160 DOI: 10.3389/978-2-88945-619-2 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Geography
Added to DOAB on : 2019-01-23 14:53:43
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Abstract

Melt takes place where the surface of glaciers or ice sheets interacts with the atmosphere. While the processes governing surface melt are fairly well understood, the pathways of the meltwater, from its origin to the moment it leaves a glacier system, remain enigmatic. It is not even guaranteed that meltwater leaves a glacier or ice sheet. On Greenland, for example, only slightly more than 50% of the meltwater runs off. The remainder mostly refreezes within the so-called firn cover of the ice sheet. This eBook contains 11 studies which tackle the challenge of understanding meltwater retention in snow and firn from various angles. The studies focus both on mountain glaciers and on the Greenland ice sheet and address challenges such as measuring firn properties, quantifying their influence on meltwater retention, modelling firn processes and meltwater refreezing as well as unravelling the mechanisms within the recently discovered Greenland firn aquifers.

Satellite Altimetry for Earth Sciences

Authors: --- --- ---
ISBN: 9783038976806 9783038976813 Year: Pages: 484 DOI: 10.3390/books978-3-03897-681-3 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General) --- Geophysics and Geomagnetism
Added to DOAB on : 2019-08-28 11:21:27
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Satellite altimetry is a radar technique for measuring the topography of the Earth’s surface. It was initially designed for measuring the ocean’s topography, with reference to an ellipsoid, and for the determination of the marine geoid. Satellite altimetry has provided extremely valuable information on ocean science (e.g., circulation surface geostrophic currents, eddy structures, wave heights, and the propagation of oceanic Kelvin and Rossby waves). With more than 25 years of observations, it is also becoming vital to climate research, providing accurate measurements of sea level variations from regional to global scales. Altimetry has also demonstrated a strong potential for geophysical, cryospheric, and hydrological research and is now commonly used for the monitoring of Arctic and Antarctic ice sheet topography and of terrestrial surface water levels. This book aims to present reviews and recent advances of general interest in the use of radar altimetry in Earth sciences. Manuscripts are related to any aspect of radar altimetry technique or geophysical applications. We also encourage manuscripts resulting from the application of new altimetric technology (SAR, SARin, and Ka band) and improvements expected from missions to be launched in the near future (i.e., SWOT).

Keywords

satellite altimetry --- Envisat --- SARAL --- unsupervised classification --- K-medoids --- Greenland Sea --- Fram Strait --- upper layer thickness --- satellite altimeter --- two-layer ocean model --- South China Sea --- coastal altimetry --- sea surface height --- Jason-2 --- waveform retracking --- satellite altimetry --- inland water --- CryosSat-2 SAR --- Mekong Basin --- water level time series --- classification --- stack data --- altimetry --- Ka-band --- data processing --- calibration --- validation --- altimetry --- SAR --- calibration --- validation --- sea surface height --- coastal altimetry --- validation --- tide gauge --- altimetry --- Ka-band --- oceanography --- hydrology --- ice --- geodesy --- Jason-2 --- Hong Kong coast --- retracking --- X-TRACK --- ALES --- PISTACH --- radar altimetry --- coastal altimetry --- sea surface height --- topography of the intertidal zone --- ERS-2 --- ENVISAT --- SARAL --- CryoSat-2 --- altimetry --- water level --- discharge --- Sentinel-3 --- satellite altimetry --- microwave radiometer --- wet tropospheric correction --- wet path delay --- sensor calibration --- HY-2A --- waveform retracking --- range precision --- marine gravity --- radar altimetry --- waveform --- dielectric permittivity --- soil moisture --- satellite altimetry --- SWOT --- western Mediterranean Sea --- fine scale --- SWOT simulator --- ROMS model --- filtering --- storm surge --- satellite altimetry --- calibration --- numerical modelling --- FVCOM --- ocean tides --- coastal altimetry --- ALES retracker --- ocean geostrophy --- water volume transport --- satellite geodesy --- space gravity --- altimetry --- Argo --- Southern Ocean --- ACC --- lake level --- lake volume --- evaporation --- streamflow --- Gravity Recovery and Climate Experiment (GRACE) --- altimetry --- Landsat --- Aral Sea --- altimetry --- water levels --- validation --- Inner Niger Delta --- altimetry --- orbit decay --- drifting orbit --- geodetic orbit --- leads --- satellite altimetry --- CryoSat-2 --- classification --- peakiness --- polar ocean

Arid Land Systems: Sciences and Societies

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ISBN: 9783039213474 9783039213481 Year: Pages: 380 DOI: 10.3390/books978-3-03921-348-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Environmental Sciences
Added to DOAB on : 2019-12-09 16:10:12
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Abstract

Understanding deserts and drylands is essential, as arid landscapes cover >40% of the Earth and are home to two billion people. Today's problematic environment–human interaction needs contemporary knowledge to address dryland complexity. Physical dimensions in arid zones—land systems, climate and hazards, ecology—are linked with social processes that directly impact drylands, such as land management, livelihoods, and development. The challenges require integrated research that identifies systemic drivers across global arid regions. Measurement and monitoring, field investigation, remote sensing, and data analysis are effective tools to investigate natural dynamics. Equally, inquiry into how policy and practice affect landscape sustainability is key to mitigating detrimental activity in deserts. Relations between socio-economic forces and degradation, agro-pastoral rangeland use, drought and disaster and resource extraction reflect land interactions. Contemporary themes of food security, conflict, and conservation are interlinked in arid environments. This book unifies desert science, arid environments, and dryland development. The chapters identify land dynamics, address system risks and delineate human functions through original research in arid zones. Mixed methodologies highlight the vital links between social and environmental science in global deserts. The book engages with today's topical themes and presents novel analyses of arid land systems and societies.

Keywords

Central Asia --- landscape --- One Belt --- One Road --- Kazakhstan --- Kyrgyzstan --- infrastructure --- environment --- New Silk Road --- drylands --- wind erosion modelling --- drag partition --- aerodynamic roughness --- remote sensing --- computational fluid dynamics --- cellular automata --- remote sensing --- modelling --- coverage --- grass height --- Cuchillas de la Zarca --- Chobe --- forest resources --- ecosystem services --- non-linear change --- protected areas --- disturbance --- drought --- sustainable livelihoods --- ecotone --- dryland --- KAZA --- Southern Africa --- nomadic pastoralism --- spatial migration model --- Afar --- livestock --- fodder demand --- fodder supply --- Asian dust --- human health --- Mongolia --- Japan --- subarctic agriculture --- Greenland --- soil quality index --- farming at its limits --- air temperature increase --- increase of growing season --- dry lake beds --- dust storm emission --- remote sensing --- Gobi Desert region --- communal rangelands --- property rights --- environmental impacts --- policy implementation --- drylands --- arid region --- LUCC --- driving forces --- snow index --- SPOT VGT --- Kashgar Region --- degrading --- tamarind age --- regeneration --- invasive vine --- vegetation survey --- erosion --- rotational grazing --- continuous grazing --- grassland degradation --- case study of nomadic and settlement grazing system --- remote sensing --- Mongolian grassland --- arid area --- land use change --- soil carbon storage --- global carbon balance --- the Shiyang River Basin --- riparian ecosystems --- Sonoran desert --- remote sensing --- land cover/land use --- drip irrigation --- groundwater --- common-pool resource --- water rights --- local farming --- desert reclamation --- desertification --- river basin development --- political ecology --- water --- vegetation response to precipitation --- dust storm outbreak --- cross correlation analysis --- the Hovmoller diagram --- environmental regime shift --- Gobi desert of Mongolia --- climate hazard --- Asia --- drylands --- risk --- drought --- desert --- Central Asia --- Kyrgyzstan --- infrastructure --- environment --- mining --- social movements --- protest --- environmental justice --- subversive clientelism --- China --- Tibetan Plateau --- Sanjiangyuan region --- social–ecological systems --- pastoralism --- partnerships --- co-management --- national parks --- Belt and Road Initiative --- mountains of Central Asia --- pastoralism --- Ethiopia --- South Omo --- Nyangatom --- Jordan River Basin --- water productivity --- Jordan --- Israel --- Palestine --- agriculture --- agricultural water intensity --- decoupling --- water security --- institutional change --- ecosystem services --- economic valuation --- drylands --- absence --- afforestation --- charisma --- China --- conservation --- desertification --- Gobi --- Mongolia

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