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Temporal and Spatial Evolution Characteristics of Meteorological Drought in the Loess Plateau from 1961 to 2020
Published 2023-01-01“…Based on the daily meteorological data of 61 meteorological stations in the Loess Plateau from 1961 to 2020,this paper explores the historical arid evolution characteristics of the study area.The paper adopts the standardized precipitation evapotranspiration index (SPEI),Morlet wavelet analysis,drought area coverage,drought frequency,and Mann-Kendall mutation test to reveal the characteristics of dry and wet changes and cycle characteristics of the Loess Plateau under the background of nearly 60a global warming.Meanwhile,it carries out the attribution analysis of drought.The results show that the alternating wet and dry variation of SPEI values is region-wide.Annual SPEI_12 and spring,autumn,and winter SPEI_3 show a decreasing trend year by year during the study period,and the decreasing trend of drought tendency is ranked as autumn>spring>winter>annual.Summer SPEI_3 shows a relatively flat increasing trend with a trend rate of 0.02/10a.The overall drought coverage area shows an upward trend,and the annual drought frequency is between 31.40% and 35.15%.The aridification trend of the central and western regions is large.The cycle of dry and wet changes at different time scales is unstable,and it is currently in the stage of warm and humidification for a long time.The current trend of warming and humidification is only reflected in quantitative changes,which is not enough to change the basic climatic state of the region and is still in the arid and semi-arid climate range of cool and dry.…”
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Spatial and Temporal Characteristics of Meteorological Drought in Shandong Province, China, from 1961 to 2008
Published 2014-01-01“…This study is dedicated to making a comprehensive and quantitative analysis of the spatial patterns of drought frequency and its climate trend coefficient, drought grades, and temporal characteristics of drought coverage area, drought duration, and drought intensity from 1961 to 2008 by using the meteorological drought composite index (CI). …”
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SPEI-Based Spatiotemporal Analysis of Drought in Haihe River Basin from 1961 to 2010
Published 2016-01-01“…The results show that (1) from 1961 to 2010 the drought frequency and degree in annual and seasonal scale are rising and the affecting areas of all degrees of drought have a temporal variability of increasing trend. …”
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Actores gubernamentales de la política cultural cubana entre 1949 y 1961
Published 2012-01-01“…El artículo Actores gubernamentales de la política cultural cubana entre 1949 y 1961, pretende esbozar la estrategia cultural desarrollada en Cuba por tres instituciones del Estado en los años seleccionados, de forma tal que se presenten estas como un largo y complejo proceso, con sus naturales rupturas y continuidades, proceso que forma parte del sistema gubernativo, fundamentalmente desde el siglo XX. …”
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Lwowiana w zbiorach Biblioteki Politechniki Krakowskiej. Analiza najstarszych inwentarzy przybytków (1946-1961)
Published 2010-01-01“…Na podstawie dwunastu najstarszych ksiąg inwentarzowych Biblioteki Politechniki Krakowskiej pochodzących z lat 1946-1961 sporządzono wykaz, a następnie jednostkowe opisy bibliograficzne 377 tytułów książek wydanych we Lwowie w latach 1747-1939, znajdujących się w zbiorach Biblioteki. …”
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Potential Evapotranspiration Reduction and Its Influence on Crop Yield in the North China Plain in 1961–2014
Published 2020-01-01“…Based on data from 61 meteorological stations from 1961 to 2014 in the North China Plain (NCP), the spatiotemporal characteristics of climate variables, such as humidity index, precipitation, and potential evapotranspiration (ET0), were analyzed. …”
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Manifestation du 17 octobre 1961 à Paris, L’oubli pour mémoire collective d’une violente répression policière
Published 2011-08-01Subjects: Get full text
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Au fil de nos souvenirs : le 17 octobre 1961, emblème des violences policières
Published 2007-11-01“…From an evocation to another, from an entrepreneur de mémoire to another, the memory of October 17th, 1961, supported by photographs left by Kagan, becomes the symbol of police violence. …”
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L’américanisation d’un intellectuel français : le cas d’Yves Simon (1903-1961)
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« Sortir du colonialisme », Le 17 octobre 1961 par les textes de l’époque
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Selective list of the catalogues of the VIR Global Collection on grain legumes for 1963–2022 and fodder crops for 1961–2019
Published 2022-10-01“…Since 1961, VIR has been publishing the series Catalogue of the VIR Global Collection, which had the original name Catalogue–Directory of the VIR Global Collection. …”
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Recognition of Changes in Air and Soil Temperatures at a Station Typical of China’s Subtropical Monsoon Region (1961–2018)
Published 2019-01-01“…Based on daily air and soil temperatures (depth: 0, 20, 80, and 320 cm) recorded at the Nanchang Weather Station (1961–2018), this study investigated the variation trend, abrupt changes, and years of anomalous annual and seasonal mean air and soil temperatures. …”
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Apuntes para la historia de la enseñanza de la Oftalmología en Cienfuegos: 1961-2011
Published 2013-08-01“…Sobre su enseñanza en la provincia de Cienfuegos no existen muchos documentos, por eso este artículo tiene como propósito hacer un recuento de la enseñanza de la Oftalmología en esta provincia desde 1961 hasta la actualidad, haciendo énfasis en los cambios en la etapa revolucionaria que se inicia con la división política administrativa del país. …”
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Temporal and Spatial Evolution Characteristics of Extreme Climate Events in Grand Shangri-La Region from 1961 to 2019
Published 2022-01-01“…The Grand Shangri-La region connects the Qinghai-Tibet Plateau,the Yunnan-Guizhou Plateau,and the Hengduan Mountains and is of great geographical significance.Five rivers flow through the region,and the climate is vulnerable.Therefore,it is necessary to explore extreme climate changes and their response mechanism,so as to assess regional climate risks and achieve disaster warnings.Based on the daily temperature and precipitation data of 56 meteorological stations from 1961 to 2019,this paper analyzes changes in extreme climate indexes and their correlation with large-scale circulation index in the region by using Mann-Kendall,Sen's slope estimation,Pettitt test,and Pearson correlation analysis.The results show that:① The extreme warm index and the extreme precipitation intensity index (RX1day,R95p,R99p,and SDII) increase significantly,while the cold index (CSDI、FD、ID、TN10p、TX10p) and the number of continuous humid days decrease greatly.In terms of different seasons,the warming amplitude of most of the extreme temperature indexes in winter is higher than that in summer,and the precipitation intensity increases gradually in summer and autumn but decreases slightly in winter.② Spatially,the diurnal temperature range in the north of the Qinghai-Tibet Plateau is higher than that in the south,and the frequency of extremely high-temperature rises,with the high temperature appearing mostly in arid valleys in the south and east of the Qinghai-Tibet Plateau.The precipitation intensity is high in the south and west of the Hengduan Mountains,and persistent precipitation is strong in the Yalong River basin and the upper reaches of the Jinsha River in the north.③ Extreme climate indexes and south China sea summer monsoon index (SCSMI) are significantly correlated in the same year.In addition,there is a one-year response lag between the extreme precipitation index and Arctic oscillation (AO),North Atlantic oscillation (NAO),and Pacific decadal oscillation (PDO).The above analysis shows that the Grand Shangri-La region generally shows warming and humid climate characteristics.The frequency of heavy precipitation in flood season and warm winter events increases and is closely related to large-scale circulation.…”
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Drought Occurrence in Central European Mountainous Region (Tatra National Park, Slovakia) within the Period 1961–2010
Published 2015-01-01“…The main goals of this research include identifying drought variability and its characteristics over the Tatra National Park in the West Carpathians (Slovakia), especially to characterizing drought variability and its spatial pattern across the Tatra National Park from 1961 to 2010 using the Standardized Precipitation Index (SPI) and standard Geographic Information System (GIS) methods. …”
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Trends and Spatiotemporal Patterns of the Meteorological Drought in the Ili River Valley from 1961 to 2023: An SPEI-Based Study
Published 2025-01-01“…In this study, we analyze the spatiotemporal evolution of drought in the IRV from 1961 to 2023, using data from ten meteorological stations. …”
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Relationships between Rainy Days, Mean Daily Intensity, and Seasonal Rainfall over the Koyna Catchment during 1961–2005
Published 2012-01-01“…In the present study, daily rainfall data of the stations inside the Koyna catchment has been analysed for the period of 1961–2005 to understand the relationship between the rain and rainy days, mean daily intensity (MDI) and seasonal rainfall over the catchment on monthly as well as seasonal scale. …”
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Aproximación al barrio Policarpa Salavarrieta por medio de la organización social CENAPROV (Bogotá), 1961-1970
Published 2018-01-01“…El artículo analiza la experiencia entre los años 1961 a 1970 del barrio Policarpa Salavarrieta, el cual está ubicado en la ciudad de Bogotá y es emblemático en las luchas por la vivienda digna que impulso la Central Nacional Provivienda. …”
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