Výsledky vyhledávání - "Steve Margulis"

Estimation of Turbulent Heat Fluxes via Assimilation of Air Temperature and Specific Humidity into an Atmospheric Boundary Layer Model

Autor: Pierre Gentine, Sayed M. Bateni, Steve Margulis, Elahe Tajfar, Thomas Auligné

Publikováno v: Journal of Hydrometeorology. 21:205-225

A number of studies have used time series of air temperature and specific humidity observations to estimate turbulent heat fluxes. These studies require the specification of surface roughness lengths for heat and momentum (that are directly related t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1155c0eb02833e5542d4ec2c69c8e36f
https://doi.org/10.1175/jhm-d-19-0104.1

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Observing System Simulation Experiment for Remote Sensing of Snow at P-Band

Autor: Simon Yueh, Xiaolan Xu, Rashmi Shah, Steve Margulis

Publikováno v: IGARSS

Recently, the Signal of Opportunity (SoOp) has been used in monitoring the snow pack from P-band. This technology makes use of existing satellite transmissions and become a cost-effective alternative to existing active technologies. The theoretical p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36c983bca36bb948badac43c3a59c594
https://doi.org/10.1109/igarss39084.2020.9324240

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Characterizing the Effect of Vegetation Dynamics on the Bulk Heat Transfer Coefficient to Improve Variational Estimation of Surface Turbulent Fluxes

Autor: Steve Margulis, S. M. Bateni, Tongren Xu, Leila Farhadi, Abedeh Abdolghafoorian

Publikováno v: Journal of Hydrometeorology. 18:321-333

Estimation of turbulent heat fluxes by assimilating sequences of land surface temperature (LST) observations into a variational data assimilation (VDA) framework has been the subject of numerous studies. The VDA approaches are focused on the estimati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3fb75c98c75e712a9ea51aaf331a5d21
https://doi.org/10.1175/jhm-d-16-0097.1

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P-Band Signals of Opportunity for Remote Sensing of Root Zone Soil Moisture

Autor: Steve Margulis, Simon Yueh, Kelly Elder, Xiaolan Xu, Rashmi Shah

Publikováno v: IGARSS

The P-band Signals of Opportunity (SoOp) technique has significant potential for remote sensing of root zone soil moisture from space. We have conducted a proof-of-concept experiment to demonstrate the sensitivity of P-band reflectivity to soil moist

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d133771c3e40221ab2dc2c9f3797cdcc
https://doi.org/10.1109/igarss.2018.8518079

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Coupled estimation of surface heat fluxes and vegetation dynamics from remotely sensed land surface temperature and fraction of photosynthetically active radiation

Autor: Laurent Kergoat, Fabio Castelli, S. M. Bateni, Dara Entekhabi, Steve Margulis

Publikováno v: Water Resources Research. 50:8420-8440

Remotely sensed Land Surface Temperature (LST) and Fraction of Photosynthetically Active Radiation absorbed by vegetation (FPAR) are assimilated, respectively, into the Surface Energy Balance (SEB) equation and a Vegetation Dynamics Model (VDM) in or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9246b5ffb9ca99fde73983d8eb9739a3
https://doi.org/10.1002/2013wr014573

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Feasibility of Characterizing Snowpack and the Freeze–Thaw State of Underlying Soil Using Multifrequency Active/Passive Microwave Data

Autor: Kyle C. McDonald, S. M. Bateni, Steve Margulis, Chunlin Huang, Erika Podest

Publikováno v: IEEE Transactions on Geoscience and Remote Sensing. 51:4085-4102

An ensemble-based data assimilation approach is developed to characterize the snow water equivalent (SWE) and underlying soil freeze-thaw state (including the soil surface temperature and both soil ice and liquid water content) using multifrequency p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::699219c8af5d6518a4333bb883b63ab3
https://doi.org/10.1109/tgrs.2012.2229466

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Feasibility of improving a priori regional climate model estimates of Greenland ice sheet surface mass loss through assimilation of measured ice surface temperatures

Autor: Marco Tedesco, Patrick Alexander, Xavier Fettweis, M. Navari, S. M. Bateni, Steve Margulis

Publikováno v: The Cryosphere, Vol 10, Iss 1, Pp 103-120 (2016)

The Greenland ice sheet (GrIS) has been the focus of climate studies due to its considerable impact on sea level rise. Accurate estimates of surface mass fluxes would contribute to understanding the cause of its recent changes and would help to bette

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49d1c54cf07fd53d002a26efe8d0a1ac
http://www.vliz.be/imisdocs/publications/302403.pdf

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Impact of Covariance Localization on Ensemble Estimation of Surface Downwelling Longwave and Shortwave Radiation Fluxes

Autor: Steve Margulis, Barton A. Forman

Publikováno v: Journal of Hydrometeorology. 13:1301-1316

Accurate estimates of terrestrial hydrologic states and fluxes are, in large part, dependent on accurate estimates of the spatiotemporal variability and uncertainty of land surface forcings, including downwelling longwave (LW) and shortwave (SW) flux

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::28d3abdcf47a8121e3891224ad26bbf8
https://doi.org/10.1175/jhm-d-11-073.1

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