نتایج جستجو برای: smap

تعداد نتایج: 520  

Journal: :Natural Hazards and Earth System Sciences 2021

Abstract. In 2018 Typhoon Mangkhut (locally known as Ompong) triggered thousands of landslides in the Itogon region Philippines. A landslide inventory affected is compiled for first time, comprising 1101 over a 570 km2 area. The used to study geomorphological characteristics and land cover more prone landsliding well hydrometeorological conditions that led widespread failure. results showed mos...

Journal: :Remote Sensing 2023

Coastal upwelling regions are one of the most dynamic areas world’s oceans. The California and Baja Coasts impacted by both coastal Current, leading to frontal activity that is captured gradients in Sea Surface Temperature (SST) Salinity (SSS). Satellite data a great source spatial study fronts. However, biases near coarse resolutions can impair its usefulness areas. In this work SST from NASA ...

Introduction: Increasing or reducing the production of suspended particles depends on the important climatic and terrestrial characteristics of a region. One of the most important climatic factors affecting soil erosion is wind speed, so if the surface winds speed in a region exceeds the threshold of erosion, soil susceptibility to erosion and dust production increases. In contrast, the most im...

Journal: :Hydrology and Earth System Sciences 2022

Abstract. A soil moisture retrieval assimilation framework is implemented across South Asia in an attempt to improve regional estimation as well provide a consistent dataset. This study aims the spatiotemporal variability of estimates by assimilating Soil Moisture Active Passive (SMAP) near-surface retrievals into land surface model. The Noah-MP (v4.0.1) model run within NASA Land Information S...

Journal: :Bulletin of the American Meteorological Society 2021

Abstract MTrack is an automated algorithm that determines the center location (latitude and longitude) of a tropical cyclone from scalar wind field derived satellite observations. Accurate storm centers are useful for operational forecasting cyclones their reanalysis (e.g., research on surge modeling). Currently, fixes have significantly larger errors weak, disorganized storms. The presented he...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده منابع طبیعی 1390

جنگل های زاگرس به عنوان یکی از مهم ترین و ارزشمندترین اکوسیستم های ایران به شمار می رود. آگاهی از میزان دقیق جنگل زدایی و تخریب، جهت مدیریت و برنامه ریزی در این جنگل ها ضروری به نظر می رسد. یکی از راه های دسترسی به این گونه اطلاعات استفاده از فناوری سنجش از دور و داده های ماهواره ای است. مشکل اساسی در تولید نقشه های مناسب با استفاده از تصاویر با قدرت تفکیک مکانی متوسط در جنگل های تنک وجود پیکسل...

Journal: :Remote Sensing 2022

Soil moisture (SM) has normally been estimated based on a linear relationship between SM and the surface reflectivity (?) from spaceborne Global Navigation Satellite System (GNSS)-Reflectometry, while it usually relies inputs of data without considering vegetation optical depth (VOD/?) effects. In this study, new scheme is proposed for retrieving soil Cyclone GNSS (CyGNSS) data. The variation C...

Journal: :Remote Sensing 2023

Satellites are designed to monitor geospatial data over large areas at a catchment scale. However, most of satellite validation works conducted local point scales with lack spatial representativeness. Although upscaling them average several collected in the field, it is almost impossible reorganize backscattering responses pixel scales. Considering influence soil storage on watershed streamflow...

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