Results 51 to 60 of about 843 (193)

Monitoring Flood Inundation Dynamics From Space

Reviews of Geophysics, Volume 64, Issue 1, March 2026.
Abstract With the increasing intensity and frequency of flood events worldwide, the need for accurate and timely inundation mapping has never been more critical. Large‐scale flood extent estimations are vital for coordinating effective disaster response, facilitating recovery, and building future resilience.
C. Campo, P. Tamagnone, S. Choy, T. D. Tran, G. J.‐P. Schumann, Y. Kuleshov   +5 more
wiley   +1 more source

Wind Speed Estimation From CYGNSS Using Artificial Neural Networks

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
In this article, a retrieval algorithm based on the use of an artificial neural network (ANN) is proposed for wind speed estimations from cyclone global navigation satellite system (CYGNSS).
Jennifer Reynolds, Maria Paola Clarizia, Emanuele Santi   +2 more
doaj   +1 more source

Satellite‐Based Estimation of Near‐Surface Specific Humidity During Tropical Cyclones in the Western North Pacific and North Atlantic

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The near‐surface specific humidity is critical for accurately estimating the enthalpy flux from the ocean, which plays an important role in tropical cyclone intensification. However, under the severe oceanic and atmospheric conditions of these storms, even spaceborne microwave radiometers struggle to retrieve reliable humidity data.
Hiroyuki Tomita, Akiyoshi Wada
wiley   +1 more source

The Indian Ocean–Land–Atmosphere (IOLA)‐Coupled Mesoscale Prediction Framework for Inland Severe Weather and Coastal Hazards Forecasting

Meteorological Applications, Volume 33, Issue 1, January/February 2026.
For seamless prediction of severe weather across scales, we developed the Indian Ocean–Land–Atmosphere (IOLA) Coupled Regional Prediction System. Extensive testing demonstrates that IOLA significantly improves predictions, particularly for monsoon‐driven heavy rainfall and coastal hazards.
Sundararaman Gopalakrishnan, Krishna K. Osuri, Dev Niyogi, Sudheer Joseph, Shyama Mohanty, Yerni Srinivas Nekkali, Sasanka Talukdar, N. D. Manikanta, Imamah Ali, Ghassan Alaka, Ananda Das, Raghu Nadimpalli, Akhil Srivastava, Srinivas Kumar Tummala, T. M. Balakrishnan Nair, M. Mohapatra, V. S. Prasad, A. Suryachandra Rao, U. C. Mohanty, R. Krishnan, Frank Marks, M. Ravichandran   +21 more
wiley   +1 more source

Unlocking the potential of CYGNSS for pan-tropical inland water mapping through multi-source data and transformer

International Journal of Applied Earth Observations and Geoinformation
Cyclone Global Navigation Satellite System (CyGNSS) data are widely recognized for their sensitivity to inland water bodies. However, the detection of water bodies using single CyGNSS data is subject to uncertainties, presenting challenges for large ...
Yuhan Chen, Qingyun Yan
doaj   +1 more source

Detecting Localized Floods in Tropical Regions With CYGNSS SmallSat Constellation: A Proof of Concept From the Maritime Continent

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Flooding events are a major contributor to natural disasters across the global tropics. However, reliable flood data are sparse, which limits our ability to understand flood dynamics across spatial and temporal scales. Here, data from the CYGNSS SmallSat constellation are utilized to identify small‐ to regional‐scale flooding events in Sumatra.
Zofia Baldysz, Dariusz B. Baranowski, Piotr J. Flatau, Maria K. Flatau, Clara Chew   +4 more
wiley   +1 more source

Evaluation of Spaceborne GNSS-R Retrieved Ocean Surface Wind Speed with Multiple Datasets

Remote Sensing, 2019
Spaceborne Global Navigation Satellite Systems-Reflectometry (GNSS-R) can estimate the geophysical parameters by receiving Earth’s surface reflected signals. The CYclone Global Navigation Satellite System (CYGNSS) mission with eight microsatellites
Zhounan Dong, Shuanggen Jin
doaj   +1 more source

Distribution of Plastics of Various Sizes and Densities in the Global Ocean From a 3D Eulerian Model

Journal of Geophysical Research: Oceans, Volume 130, Issue 9, September 2025.
Abstract We study the global transport and distribution of microplastics (MPs) using a three‐dimensional Eulerian model. For the first time, the effects of both particle size and density are accounted for, influencing the vertical transport of MPs, and leading to an advanced understanding of their global distribution.
Zih‐En Tseng, Yue Wu, Dimitris Menemenlis, Guangyao Wang, Chris Ruf, Yulin Pan   +5 more
wiley   +1 more source

First Evaluation of Topography on GNSS-R: An Empirical Study Based on a Digital Elevation Model

Remote Sensing, 2019
Understanding the effects of Earth’s surface topography on Global Navigation Satellite Systems Reflectometry (GNSS-R) space-borne data is important to calibrate experimental measurements, so as to provide accurate soil moisture content (SMC ...
Hugo Carreno-Luengo, Guido Luzi, Michele Crosetto   +2 more
doaj   +1 more source

Regional Land Surface Conditions Developed Using the High‐Resolution Land Data Assimilation System: Challenges Over Complex Orography Himalayan Region

Meteorological Applications, Volume 32, Issue 4, July/August 2025.
High‐resolution land data assimilation system (HRLDAS) simulations at 2 km resolution from 2011 to 2021 over Uttarakhand. HRLDAS outperforms global and regional analyses by capturing finer spatial heterogeneity, with lower soil moisture error and high soil temperature correlation (0.94) against satellite and in situ observations.
Buri Vinodhkumar, Krishna Kishore Osuri, A. P. Dimri, Sandipan Mukherjee, Sami G. Al‐Ghamdi, Dev Niyogi   +5 more
wiley   +1 more source