Search Results

You are looking at 1 - 10 of 177 items for :

  • Journal of Hydrometeorology x
  • All content x
Clear All
Wade T. Crow, Concepcion Arroyo Gomez, Joaquín Muñoz Sabater, Thomas Holmes, Christopher R. Hain, Fangni Lei, Jianzhi Dong, Joseph G. Alfieri, and Martha C. Anderson

). This approach combines best-possible estimates of land surface states based on available observations and short-range atmospheric forecasts provided by the NWP system. In this regard, the European Space Agency (ESA) Soil Moisture Ocean Salinity (SMOS) mission ( Kerr et al. 2012 ), specifically designed to measure surface SM and ocean salinity from space, provides a unique opportunity to assimilate L-band microwave brightness temperature (Tb) observations that are highly sensitive to surface SM

Restricted access
Anne Felsberg, Gabriëlle J. M. De Lannoy, Manuela Girotto, Jean Poesen, Rolf H. Reichle, and Thomas Stanley

. Here, we will investigate the potential of two L-band (1.4 GHz) microwave satellite missions that are dedicated to soil moisture monitoring, i.e., the Soil Moisture Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP) missions ( Kerr et al. 2012 ; Entekhabi et al. 2010 ). We further use data from the Gravity Recovery and Climate Experiment (GRACE) mission, which provides anomalies in the vertically integrated terrestrial water storage (TWS), including groundwater, soil moisture, snow

Open access
David A. Lavers, Shaun Harrigan, and Christel Prudhomme

modeled freshwater flux from the land to the ocean. The resulting reduced ocean salinity then in turn could affect the ocean circulation and degrade ocean–atmosphere interactions. It has been previously found in a project—named the Benefits of dynamically modeled river discharge input for ocean and coupled atmosphere–land–ocean systems ( Mercator Ocean 2020 )—that when coupling the land and the ocean with the GloFAS-ERA5 river discharge reanalysis, a large degradation was seen in ocean modeling skill

Open access
Jesse E. Bell, Michael A. Palecki, C. Bruce Baker, William G. Collins, Jay H. Lawrimore, Ronald D. Leeper, Mark E. Hall, John Kochendorfer, Tilden P. Meyers, Tim Wilson, and Howard J. Diamond

fiscal year 2009. The addition of soil observations will not only directly improve U.S. drought-monitoring capabilities, but USCRN will now be able to assist in validation of newly or soon-to-be deployed satellites for soil moisture monitoring [e.g., Soil Moisture and Ocean Salinity ( SMOS ) and Soil Moisture Active Passive ( SMAP )]. In March 2009, national and international soil-measurement experts from multiple government agencies and academic institutions were invited to Oak Ridge, Tennessee

Restricted access
Trent W. Ford, Steven M. Quiring, Chen Zhao, Zachary T. Leasor, and Christian Landry

.25° horizontal resolution. We use the ESA-CCI dataset in this study instead of an individual platform such as Soil Moisture Active Passive (SMAP; Entekhabi et al. 2010 ) or Soil Moisture and Ocean Salinity (SMOS L3; Kerr et al. 2010 ) because of their relatively short data records (~5 years and ~11 years, respectively). ESA-CCI provides daily soil moisture observations in units of volumetric water content (m 3 m −3 ). The Noah soil moisture dataset, which is part of the National Land Data Assimilation

Restricted access
Prabhakar Shrestha

water storage. The model was then initialized with spinup soil–vegetation states, and a 10-yr transient run from 2008 to 2017 was conducted using the offline atmospheric forcing data. The vegetation phenology (consisting of monthly data) was updated yearly based on the MODIS remote sensing product. The model was integrated at hourly frequency, and the outputs were generated at 5-day intervals. d. Observations The near-surface soil moisture from the Soil Moisture and Ocean Salinity (SMOS; Kerr et al

Restricted access
R. Rosolem, W. J. Shuttleworth, M. Zreda, T. E. Franz, X. Zeng, and S. A. Kurc

providing validation to satellite remote sensing soil moisture data products, including those from the current Soil Moisture Ocean Salinity mission (SMOS; Kerr et al. 2001 ) and the future Soil Moisture Active Passive mission (SMAP; Entekhabi et al. 2010 ). Primary cosmic rays (mainly protons) generate cascades of secondary high-energy neutrons through collisions with nuclei in the atmosphere ( Hess et al. 1959 ). When these high-energy neutrons reach the soil, fast neutrons are created within the

Restricted access
Maheshwari Neelam, Rajat Bindlish, Peggy O’Neill, George J. Huffman, Rolf Reichle, Steven Chan, and Andreas Colliander

Active Passive (SMAP) satellite mission ( Entekhabi et al. 2014 ), which launched on 31 January 2015, is the second mission available to monitor global soil moisture along with the European Space Agency’s Soil Moisture and Ocean Salinity (SMOS) satellite ( Kerr et al. 2012 ). SMAP’s microwave radiometer operates at an L-band frequency of 1.41 GHz to measure near-surface soil moisture (~5-cm topsoil) with a global revisit of 2–3 days. Soil moisture retrievals from passive microwave measurements have

Restricted access
Liang Chen, Trent W. Ford, and Priyanka Yadav

Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP)] do not have a sufficiently long data record, we use daily surface soil moisture derived from the reanalysis system and land data assimilation system. The Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2), from the Global Modeling and Assimilation Office (GMAO) at NASA is a state-of-the-art atmospheric reanalysis that assimilates a vast number of in situ and remote sensing observations

Restricted access
Nina Raoult, Catherine Ottlé, Philippe Peylin, Vladislav Bastrikov, and Pascal Maugis

soil moisture observational products available with which to confront the models and possibly improve their representation of soil moisture. These range from local in situ measurements making up the ISMN (International Soil Moisture Network; Dorigo et al. 2011 , 2013 ) to remotely sensed global products using active or passive microwave sensors, such as SMOS (Soil Moisture Ocean Salinity; Kerr et al. 2010 ), SMAP (Soil Moisture Active Passive; Entekhabi et al. 2010b ), or the ESA CCI SM

Open access