Results 41 to 50 of about 940 (130)

THE SCATTEROMETER AS A PRESSURE SENSOR

Gayana, 2004
The UW Planetary Boundary Layer (PBL) model is used to derive surface pressure fields from scatterometer surface measurements. After a decade of comparison with NMC wind products, it is clear that the combination of the scatterometer and the PBL model ...
Robert A Brown, Jerome Patoux
doaj  

Impacts of Bogus Vortex Initialization Using Scatterometer-Derived 34 kt Wind Radii and Centers on Tropical Cyclone Forecasts

Remote Sensing
This study demonstrates the positive impact of scatterometer wind-based bogus vortex initialization on forecasts of Typhoon Doksuri (2023). In this scheme, the NCEP analysis vortex in the initial conditions is replaced with a bogus vortex.
Weixin Pan, Xiaolei Zou, Yihong Duan
doaj   +1 more source

Assimilating Advanced Scatterometer Winds in a High-Resolution Limited Area Model Over Northern Europe

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017
Satellite-based scatterometer ocean surface wind measurements have been shown to improve global weather forecasts through data assimilation. However, these scatterometer data are not yet widely assimilated operationally in high-resolution regional models.
Teresa Valkonen, Harald Schyberg, Julia Figa-Saldana   +2 more
doaj   +1 more source

Towards operational assimilation of surface‐sensitive microwave radiances over land at Environment and Climate Change Canada: Investigation of key factors using a 1D‐EnVar framework

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 778, July 2026 Part A.
The study evaluates five factors affecting the assimilation of surface‐sensitive Advanced Microwave Sounding Unit‐A (AMSU‐A) radiances over land, including the simultaneous estimation of surface emissivity and the standard set of state variables, to improve numerical weather prediction (NWP) at Environment and Climate Change Canada (ECCC).
Zheng Qi Wang, Mark Buehner, Yi Huang, Maziar Bani Shahabadi, Joël Bédard   +4 more
wiley   +1 more source

Exploiting Aeolus winds in a regional numerical weather prediction model

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 778, July 2026 Part A.
Aeolus measured winds have proven to be beneficial for global models. However, demonstrating positive impact for limited‐area models has been a challenge so far. For the first time, we have demonstrated a statistically significant positive impact of Aeolus winds in a limited‐area model by using the 4DVar data assimilation technique and the most recent ...
Gert‐Jan Marseille, Roohollah Azad, Martin Ridal, Susanna Hagelin   +3 more
wiley   +1 more source

Snow Thickness Estimation on First-Year Sea Ice from Late Winter Spaceborne Scatterometer Backscatter Variance

Remote Sensing, 2019
Ku- and C-band spaceborne scatterometer sigma nought (σ°) backscatter data of snow covered landfast first-year sea ice from the Canadian Arctic Archipelago are acquired during the winter season with coincident in situ snow-thickness ...
John Yackel, Torsten Geldsetzer, Mallik Mahmud, Vishnu Nandan, Stephen E. L. Howell, Randall K. Scharien, Hoi Ming Lam   +6 more
doaj   +1 more source

Examination of smooth surfaces roughness using angle scatterometer. Part 1. The method of measurement. The measurement instrument [PDF]

Biuletyn Wojskowej Akademii Technicznej, 2015
The basic parameters of surface roughness are described in this article. The method of calculation of these parameters from measurement of BSDF function characterizing scatter from surface is shown.
Andrzej Pawlata
doaj   +1 more source

National Oceanic and Atmospheric Administration Soil Moisture Operational Product System: An overview and data assimilation applications

Vadose Zone Journal, Volume 25, Issue 4, July/August 2026.
Abstract National Oceanic and Atmospheric Administration–National Environmental Satellite, Data, and Information Service (NESDIS) developed the Soil Moisture Operational Product System (SMOPS) to serve as a one‐stop shop for all available microwave satellite soil moisture observations.
Jifu Yin, Xiwu Zhan, Jicheng Liu, Jong Kim, Chan‐Hoo Jeon, Gillian Petro   +5 more
wiley   +1 more source

On the Importance of the Jacobian of a DNN Observation Operator in Land Data Assimilation

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract A recent study (Shan et al., 2024, https://doi.org/10.1016/j.rse.2024.114167) showed that using a Deep‐Neural‐Network (DNN)‐based observation operator in land data assimilation (DA) does not guarantee improvements in surface soil moisture (WG2).
Xu Shan, Susan Steele‐Dunne, Sebastian Hahn, Wolfgang Wagner, Bertrand Bonan, Ou Ku   +5 more
wiley   +1 more source

Soil Moisture Impact on Convective Initiation

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract The influence of soil moisture on convective storm initiation remains an open question, with previous studies showing conflicting results regarding whether storms preferentially form over wet or dry soils. Here, we analyze the soil moisture‐convection relationship using satellite observations across North America, Africa, and Australia from ...
Faisal AlNasser, Daniel Gianotti, Dara Entekhabi   +2 more
wiley   +1 more source