Results 61 to 70 of about 1,876 (146)

Integrated traditional and graphical non-parametric trend analysis of annual, monsoon and crop seasonal rainfall over Amaravathi Basin, South-India

Results in Engineering
Rainfall trend variability is a critical factor for assessing the evidence of climate change. In this study, long-term rainfall trends were analyzed for the period 1985–2020 using the Pettitt test, the traditional Mann-Kendall (MK) and Sen’s Slope (SS ...
Hemanandhini Shanmugam, Vignesh Rajkumar Lakshmanan   +1 more
doaj   +1 more source

Trend and Variability Analysis of Rainfall and Temperature in the Dagona Wetland, Nigeria (1993-2023)

UMYU Scientifica Journal
The Dagona Wetland, a Ramsar site and biodiversity refuge in Nigeria's vulnerable Sudano-Sahelian region, faces escalating threats from climate change, yet long-term climatic trends have remained unquantified.
Yusuf Ibrahim, Abubakar Sani Bawale
doaj   +1 more source

The Implication of Climate Signal for Precipitation in the Heihe River Basin, Northwest China

Advances in Meteorology, 2016
This paper studies the stochastic dynamic variability of precipitation, for the upper, middle, and lower reaches of the Heihe River basin in Northwest China, by employing Mann-Kendall statistic, Pettitt test, and wavelet transform methods.
Fei Wang, Jun Niu
doaj   +1 more source

Analysis of the Contribution Rate of Climate Change and Anthropogenic Activity to Runoff Variation in Nenjiang Basin, China

Hydrology, 2017
The Pettitt abrupt change test method based on ArcGIS was used to undertake change-point analysis on climatic (precipitation and potential evapotranspiration; 39 meteorological stations) and runoff data (27 hydrological stations) from 1954–2015 in the ...
Liqin Dong, Guangxin Zhang, Xiping Cheng, Yanfang Wang   +3 more
doaj   +1 more source

O ANÚNCIO DE OFERTAS SUBSEQUENTES DE AÇÕES E SEU EFEITO NO PREÇO DAS AÇÕES: UMA ABORDAGEM COM BASE NO TESTE DE PETTITT

, 2016
Este artigo investigou os efeitos nos preços das ações, de empresas brasileiras, em torno do anúncio de Ofertas Subsequentes de Ações (SEO). Inicialmente, verificou-se a existência de ruptura na série temporal nos preços das ações. Em seguida, verificou-se a possível data de ruptura na série, e, então, analisou-se o retorno acionário das empresas antes
Sena, Alnio Suamy de, Azevedo Filho, Azamor Cirne de, Lucena, Wenner Glaucio Lopes   +2 more
openaire   +1 more source

Improving the performance of streamflow forecasting model using data-preprocessing technique in Dungun River Basin

E3S Web of Conferences, 2018
An accurate streamflow forecasting model is important for the development of flood mitigation plan as to ensure sustainable development for a river basin. This study adopted Variational Mode Decomposition (VMD) data-preprocessing technique to process and
Tiu Ervin Shan Khai, Huang Yuk Feng, Ling Lloyd   +2 more
doaj   +1 more source

Considerações estatísticas relativas a seis séries mensais de temperatura do ar da Secretaria de Agricultura e Abastecimento do Estado de São Paulo Statistical considerations of six monthly air temperature series of the State of São Paulo, Brazil

Revista Brasileira de Meteorologia, 2011
O objetivo do trabalho foi detectar tendências e variações climáticas nas séries mensais de temperatura máxima (Tmax) e mínima (Tmin) do Estado de São Paulo. A fim de obter melhor adequação, entre a probabilidade de ocorrência dos erros estatísticos tipo
Gabriel Constantino Blain
doaj   +1 more source

Trend analysis and change-point detection of monsoon rainfall in Uttarakhand and its impact on vegetation productivity

Journal of Agrometeorology
This study analyzes the long-term spatio-temporal changes and trend analysis in rainfall using the data from 1901 to 2020 and its impact on vegetation from 2000 to 2020 across districts of Uttarakhand.
PRIYANKA SWAMI
doaj   +1 more source

Temporal trend and dynamics of the active layer at different monitoring points in Maritime Antarctica and Peninsula [PDF]

Anais da Academia Brasileira de Ciências
Antarctica provides a unique opportunity to understand changes in permafrost and global climate. Four monitoring sites were selected between maritime Antarctica and the Peninsula to study the temporal trend, air and soil temperature, and dynamics of the ...
TAMÍRES P. CORREIA, GUSTAVO V. VELOSO, GUSTAVO B. LYRA, ROBERTO F. MICHEL, ELPÍDIO INÁCIO FERNANDES FILHO, CARLOS ERNESTO SCHAEFER, FLÁVIO B. JUSTINO, MARCIO R. FRANCELINO   +7 more
doaj   +1 more source

Analysis of the Climatological Drought Trend Variations Using Mann-Kendall, Sen and Pettitt Tests in Isfahan Province [PDF]

Journal of Spatial Analysis Environmental Hazarts, 2019
hamid ghorbani, abbas ali vali, hadi zarepour   +2 more
openaire   +1 more source