Zobrazeno 1 - 10
of 58
pro vyhledávání: '"S V Kumar"'
Autor:
J. M. Pflug, M. L. Wrzesien, S. V. Kumar, E. Cho, K. R. Arsenault, P. R. Houser, C. M. Vuyovich
Publikováno v:
Hydrology and Earth System Sciences, Vol 28, Pp 631-648 (2024)
Snow is a vital component of the earth system, yet no snow-focused satellite remote sensing platform currently exists. In this study, we investigate how synthetic observations of snow water equivalent (SWE) representative of a synthetic aperture rada
Externí odkaz:
https://doaj.org/article/fdc89a9dda6544ab964dd6af14bb8d15
Publikováno v:
Hydrology and Earth System Sciences, Vol 27, Pp 4039-4056 (2023)
An airborne gamma-ray remote-sensing technique provides a strong potential to estimate a reliable snow water equivalent (SWE) in forested environments where typical remote-sensing techniques have large uncertainties. This study explores the utility o
Externí odkaz:
https://doaj.org/article/04a4f1b10ae441eeb7a24bf137324348
Publikováno v:
The Cryosphere, Vol 17, Pp 3915-3931 (2023)
Satellite-based synthetic aperture radar (SAR) sensors have the potential to provide the first global measure of snow water equivalent (SWE), with key advantages compared to existing satellite observations (e.g., passive microwave sensors) such as hi
Externí odkaz:
https://doaj.org/article/820c15577a9d48cdaa39717706bf0579
Publikováno v:
Hydrology and Earth System Sciences, Vol 26, Pp 5721-5735 (2022)
Seasonal snow is an essential component of regional and global water and energy cycles, particularly in snow-dominant regions that rely on snowmelt for water resources. Land surface models (LSMs) are a common approach for developing spatially and tem
Externí odkaz:
https://doaj.org/article/2281ba0c5f184f16985ba84ec3fddc35
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 7461-7487 (2022)
Ozone (O3) dry deposition is a major O3 sink. As a follow-up study of Huang et al. (2021), we quantify the impact of satellite soil moisture (SM) on model representations of this process when different dry-deposition parameterizations are implemented
Externí odkaz:
https://doaj.org/article/618102cde6a342059de975b948213421
Autor:
W. Nie, S. V. Kumar, K. R. Arsenault, C. D. Peters-Lidard, I. E. Mladenova, K. Bergaoui, A. Hazra, B. F. Zaitchik, S. P. Mahanama, R. McDonnell, D. M. Mocko, M. Navari
Publikováno v:
Hydrology and Earth System Sciences, Vol 26, Pp 2365-2386 (2022)
The Middle East and North Africa (MENA) region has experienced more frequent and severe drought events in recent decades, leading to increasingly pressing concerns over already strained food and water security. An effective drought monitoring and ear
Externí odkaz:
https://doaj.org/article/f1b772053b834cfa955fe9c7db9ee32d
Publikováno v:
Hydrology and Earth System Sciences, Vol 26, Pp 2221-2243 (2022)
A soil moisture retrieval assimilation framework is implemented across South Asia in an attempt to improve regional soil moisture estimation as well as to provide a consistent regional soil moisture dataset. This study aims to improve the spatiotempo
Externí odkaz:
https://doaj.org/article/d198b5b658da44d9994466202fa80a4a
Publikováno v:
Hydrology and Earth System Sciences, Vol 25, Pp 4099-4125 (2021)
In this study, we tested the impact of a revised set of soil, vegetation and land cover parameters on the performance of three different state-of-the-art land surface models (LSMs) within the NASA Land Information System (LIS). The impact of this rev
Externí odkaz:
https://doaj.org/article/8185c54e71ae46e6bf87ba13407b7e88
Autor:
M. Huang, J. H. Crawford, J. P. DiGangi, G. R. Carmichael, K. W. Bowman, S. V. Kumar, X. Zhan
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 11013-11040 (2021)
This study evaluates the impact of satellite soil moisture (SM) data assimilation (DA) on regional weather and ozone (O3) modeling over the southeastern US during the summer. Satellite SM data are assimilated into the Noah land surface model using an
Externí odkaz:
https://doaj.org/article/f67da403594c403bb5448ec32d18374f
Autor:
Y. Zhou, B. F. Zaitchik, S. V. Kumar, K. R. Arsenault, M. A. Matin, F. M. Qamer, R. A. Zamora, K. Shakya
Publikováno v:
Hydrology and Earth System Sciences, Vol 25, Pp 41-61 (2021)
South and Southeast Asia is subject to significant hydrometeorological extremes, including drought. Under rising temperatures, growing populations, and an apparent weakening of the South Asian monsoon in recent decades, concerns regarding drought and
Externí odkaz:
https://doaj.org/article/b9372f71e38144b7af8314b91070618a