Results 21 to 30 of about 4,306 (212)

NASA's Soil Moisture Active Passive (SMAP) Mission and Opportunities For Applications Users [PDF]

Bulletin of the American Meteorological Society, 2013
Water in the soil, both its amount (soil moisture) and its state (freeze/thaw), plays a key role in water and energy cycles, in weather and climate, and in the carbon cycle. Additionally, soil moisture touches upon human lives in a number of ways from the ravages of flooding to the needs for monitoring agricultural and hydrologic droughts.
Brown, Molly E., Escobar, Vanessa, Moran, Susan, Entekhabi, Dara, O'Neill, Peggy E., Njoku, Eni G., Doorn, Brad, Entin, Jared K.   +7 more
openaire   +2 more sources

Joint Sentinel-1 and SMAP data assimilation to improve soil moisture estimates [PDF]

, 2017
SMAP (Soil Moisture Active and Passive) radiometer observations at similar to 40 km resolution are routinely assimilated into the NASA Catchment Land Surface Model to generate the 9 km SMAP Level-4 Soil Moisture product.
Albergel, Attema, Bartalis, Bell, Bircher, Cappelaere, Chan, Colliander, Dawdy, De Lannoy, De Lannoy, De Lannoy, De Lannoy, De Lannoy, Diamond, Dorigo, Draper, Entekhabi, Fung, G. J. M. De Lannoy, Geudtner, H. Lievens, J. P. Walker, Kerr, Koster, Lebel, Lievens, Liu, M. Cosh, McPherson, N. N. Das, Pellarin, Q. Liu, R. H. Reichle, R. S. Dunbar, S. B. Kim, Schaefer, Smith, Su, Tuanmu, Velde, W. Wagner, Wood   +42 more
core   +5 more sources

Controls on surface soil drying rates observed by SMAP and simulated by the Noah land surface model [PDF]

Hydrology and Earth System Sciences, 2018
Drydown periods that follow precipitation events provide an opportunity to assess controls on soil evaporation on a continental scale. We use SMAP (Soil Moisture Active Passive) observations and Noah simulations from drydown periods to quantify the ...
P. J. Shellito, E. E. Small, B. Livneh
doaj   +1 more source

A reduced latency regional gap-filling method for SMAP using random forest regression

iScience, 2023
Summary: The soil moisture active/passive (SMAP) mission represents a significant advance in measuring soil moisture from satellites. However, its large spatial-temporal data gaps limit the use of its values in near-real-time (NRT) applications ...
Xiaoyi Wang, Haishen Lü, Wade T. Crow, Gerald Corzo, Yonghua Zhu, Jianbin Su, Jingyao Zheng, Qiqi Gou   +7 more
doaj   +1 more source

Prediction of Large-Scale Wildfires With the Canopy Stress Index Derived from Soil Moisture Active Passive

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Land surface variables such as surface soil moisture are recognized as important wildfire indicators. However, quantifying wildfire fuel combustibility through only satellite-retrieved soil moisture remains challenging, because soil moisture does not ...
Ju Hyoung Lee
doaj   +1 more source

Downscaling of SMAP Soil Moisture Using Land Surface Temperature and Vegetation Data

Vadose Zone Journal, 2018
Remotely sensed soil moisture retrieved by the Soil Moisture Active and Passive (SMAP) sensor is currently provided at a 9-km grid resolution. Although valuable, some applications in weather, agriculture, ecology, and watershed hydrology require soil ...
Bin Fang, Venkataraman Lakshmi, Rajat Bindlish, Thomas J. Jackson   +3 more
doaj   +1 more source

Effect of Assimilating SMAP Soil Moisture on CO₂ and CH₄ Fluxes through Direct Insertion in a Land Surface Model

Remote Sensing, 2022
Soil moisture impacts the biosphere–atmosphere exchange of CO2 and CH4 and plays an important role in the terrestrial carbon cycle. A better representation of soil moisture would improve coupled carbon–water dynamics in terrestrial ecosystem models and ...
Zhen Zhang, Abhishek Chatterjee, Lesley Ott, Rolf Reichle, Andrew F. Feldman, Benjamin Poulter   +5 more
doaj   +1 more source

Agricultural Drought Monitoring via the Assimilation of SMAP Soil Moisture Retrievals Into a Global Soil Water Balance Model

Frontiers in Big Data, 2020
From an agricultural perspective, drought refers to an unusual deficiency of plant available water in the root-zone of the soil profile. This paper focuses on evaluating the benefit of assimilating soil moisture retrievals from the Soil Moisture Active ...
Iliana E. Mladenova, Iliana E. Mladenova, John D. Bolten, Wade Crow, Nazmus Sazib, Nazmus Sazib, Curt Reynolds   +6 more
doaj   +1 more source

Introducing the SMAP L4 Products and Investigating the Spatio-Temporal Variability of Soil Moisture in Iran [PDF]

Nīvār, 2022
Background and objectives: Although estimation of soil surface moisture plays an important role in soil and water resources management, unfortunately, there is currently no national soil moisture monitoring network in Iran and the distribution of in situ
Ebrahim Asadi Oskouei, Leila Godarzy, Jalil Helali   +2 more
doaj   +1 more source

Soil Moisture Active/Passive (SMAP) radiometer Subband calibration and calibration drift [PDF]

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016
The radiometer Subband calibration and calibration drift correction have been successfully used in the released radiometer L1B data product. Although their performances satisfy the requirements, they are still under continuing analysis to find their remaining uncertainty. The progress will be presented besides the current performance.
Jinzheng Peng, Jeffrey R. Piepmeier, Giovanni De Amici, Priscilla N. Mohammed   +3 more
openaire   +1 more source