Results 221 to 230 of about 6,600 (253)

Optimized spectral index models for accurately retrieving soil moisture (SM) of winter wheat under water stress

Agricultural Water Management, 2022
Abstract Soil moisture (SM) is an important indicator of the photosynthetic rate and growth status of crops. A few related parameters, such as the red-edge parameters and spectral indices, have been adopted for retrieving the SM of winter wheat. To further study their abilities to detect the SM, field-scale water stress experiments on winter wheat ...
Shoujia Ren, Bin Guo, Zhijun Wang, Juan Wang, Quanxiao Fang, Jianlin Wang   +5 more
openaire   +1 more source

Long-term changes in surface soil moisture based on CCI SM in Yunnan Province, Southwestern China

Journal of Hydrology, 2020
Abstract Soil moisture (SM) plays an important role in regional runoff variations, energy dynamics, and vegetation productivity. It is also widely used to detecting agricultural drought. Recently, a severe drought occurred in Yunnan Province in southwestern China, so long-term changes in surface SM were of concern.
Siyu Ma, Shiqiang Zhang, Qianxin Wu, Jie Wang   +3 more
openaire   +1 more source

Construction and estimation of soil moisture site with FDR and COSMIC-ray (SM-FC) sensors for calibration/validation of satellite-based and COSMIC-ray soil moisture products in Sungkyunkwan university, South Korea

Journal of Korea Water Resources Association, 2016
본 연구에서는 수원 성균관대학교 내 Frequency Domain Reflectometry (FDR) 토양수분 측정 장비 및 COSMIC-ray 중성자 측정 장비를 통한 토양수분 지점 관측 사이트를 확립하였다. 또한 양질의 토양수분 데이터 확보를 위해 연구지역 내 토질실험, 토질별 FDR 토양수분 데이터 및 COSMIC-ray 중성자 개수의 시계열 분석, 관측한 토양수분 데이터와 위성 기반 토양수분 데이터와의 비교분석을 실시하였다. 2014년도부터 6개 지점에서 표층으로부터 5 cm에서 40 cm까지 총 24개의 FDR 센서를 5~10 cm 깊이별로 설치하여 토양수분 데이터를 측정하였다.
Hyunglok Kim, Wooyeon Sunwoo, Seongkyun Kim, Minha Choi   +3 more
openaire   +1 more source

Earth Observation (EO) data for high resolution soil moisture (SM) monitoring

2023
A wealth of soil-vegetation-atmosphere (SVA) variables, such as soil moisture, leaf area index, land surface temperature, precipitation, ... are globally monitored by satellite observations funded by national and international Space Agencies. They have proven useful for improving understanding of the global water and energy cycles and strengthening ...
openaire   +2 more sources

ESA CCI SM v9: advancements in global satellite soil moisture records

Soil moisture plays a pivotal role in the Earth system, exerting a profound impact on a wide range of environmental and climatic processes. Consequently, accurate monitoring of soil moisture is essential for climate research, environmental management, and the development of adaptation strategies under changing climate conditions.
Colin Moldenhauer, Wolfgang Preimesberger, Johanna Lems, Dávid D.Kovács, Alexander Gruber, Maud Formanek, Richard de Jeu, Diane Duchemin, Nemesio J. Rodríguez-Fernández, Bethan L. Harris, Wouter Dorigo   +10 more
openaire   +1 more source

Exploiting big geodata in the context of soil moisture retrieval on large areas: the case of the SMOSAR system and SM-Tools

2023
Gridded soil moisture (SM) observations play a crucial role in understanding the hydrologic cycle and in agricultural monitoring. High-resolution (0.1 - 1.0 km) SM products can be derived from Copernicus Sentinel-1 (S-1) Synthetic Aperture Radar (SAR) data that are systematically acquired at a global scale.
Francesco Paolo Lovergine, Giuseppe Satalino, Davide Palmisano, Anna Balenzano, Francesco Mattia   +4 more
openaire   +1 more source

A gap-filled global long-term satellite soil moisture climate data record from ESA CCI SM

ESA CCI Soil Moisture is a multi-satellite climate data record that consists of harmonized, daily observations coming at present from 19 satellites operating in the microwave domain. The wealth of satellite information, particularly over the last decade, facilitates the creation of a data record with the highest possible data consistency and coverage ...
Preimesberger, Wolfgang, Stradiotti, Pietro, Frederikse, Thomas, Hirschi, Martin, Rodriguez-Fernandez, Nemesio, Gruber, Alexander, Dorigo, Wouter   +6 more
openaire   +2 more sources

Random Forest Prediction and Validation of Soil Moisture in Eastern Africa Using ESA CCI SM and ISMN In-Situ Observations

Structural breaks and reduced ground station coverage have previously limited soil moisture (SM) analyses and validation approaches over Eastern Africa. Due to its high dependence on rain-fed agriculture, it is vital to analyze SM variability and establish reliable monitoring frameworks for the region.
Zoe Helbing, Jose Antonio Sobrino
openaire   +1 more source

A roadmap for high-resolution satellite soil moisture applications – confronting product characteristics with user requirements

Remote Sensing of Environment, 2021
Jian Peng, Clement Albergel, Anna Balenzano   +2 more
exaly