نتایج جستجو برای: gldas

تعداد نتایج: 195  

ژورنال: نیوار 2018

امروزه با توجه به کاهش منابع آب و بحران آبی موجود توجه به مدیریت صحیح یکپارچه منابع آب امری مهم و ضروری می باشد. یکی از اقدامات اساسی در این زمینه آگاهی از میزان بارش، رواناب و روند تغییرات آن در محدوده حوضه‌های آبریز است. تحقیق حاضر با هدف ارزیابی دقت برآورد بارش و رواناب در استان قزوین با استفاده از مدل GLDAS و داده‌های اندازه‌گیری شده در نه ایستگاه‌ سینوپتیک و باران‌سنجی و هشت ایستگاه هیدروم...

یکی از مهم‌ترین فرآیندهای انتقال آب و انرژی در چرخه هیدرولوژیکی، تبخیر-تعرق است و تابش خورشیدی انرژی لازم برای انجام این فرآیند را تأمین می‌کند. درنتیجه تخمین هرچه دقیق‌تر میزان تبخیر-تعرق به تخمین دقیق میزان تابش خورشیدی وابسته است. این تحقیق با هدف ارزیابی میزان تابش خورشیدی در سطح زمین حاصل از سه روش معادلات تجربی (مدل‌های آنگستروم و هارگریوز-سامانی) مدل‌های فیزیکی داده‌گواری شده (GLDAS/Noah...

2015
A. Y. Sun J. Chen

Terrestrial water storage (TWS) exerts a key control in global water, energy, and biogeochemical cycles. Although certain causal relationship exists between precipitation and TWS, the latter quantity also reflects impacts of anthropogenic activities. Thus, quantification of the spatial patterns of TWS will not only help to understand feedbacks between climate dynamics and the hydrologic cycle, ...

Journal: :International Journal of Climatology 2022

Serving as the successor to ERA-Interim dataset, a new global reanalysis (i.e., ERA5) has been released by European Centre for Medium-Range Weather Forecasts. However, evaluation of performance ERA5 in relation Tibetan Plateau (TP) remains lacking. Using situ eddy covariance observations from eight stations located on TP, this study evaluated uncertainties both and ERA-Interim. Results showed t...

Journal: :Remote Sensing of Environment 2021

Abstract Global Navigation Satellite System (GNSS) instruments provide a powerful tool to investigate spatiotemporal variations in regional-scale terrestrial water storage based on the solid Earth's elastic response hydrologic loading signals. Here, we implemented an independent component analysis-based inversion method changes and hydrometeorological extremes (e.g., heavy precipitation drought...

Journal: :Remote Sensing 2021

As the “Water Tower of Asia” and “The Third Pole” world, Qinghai–Tibet Plateau (QTP) shows great sensitivity to global climate change, change in its terrestrial water storage has become a focus attention globally. Differences multi-source data different calculation methods have caused uncertainty accurate estimation storage. In this study, Yarlung Zangbo River Basin (YZRB), located southeast QT...

Journal: :Remote Sensing 2022

Surface air temperature is a critical element in the surface–atmosphere interaction, energy exchange, and water cycle. Multi-source fusion reanalysis products (hereafter referred to as reanalysis) have spatiotemporal continuity broad applicability that can provide key data support for various studies such glacier melting, soil freeze-thaw desertification, ecosystem, climate change alpine region...

Journal: Desert 2018
B. Izadi S. Ghazanfari, S. Mohammadi

      Aridity as a spatial concept and drought as a temporal concept have always been studied in different aspects as two distinct categories. However, both concepts indicate anomalies from normal condition. Several indices have been introduced to examine each of these concepts using one or more hydrological cycle’s components. Meanwhile, soil moisture and changes in its spatial and temporal va...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید