نتایج جستجو برای: rainfall variability

تعداد نتایج: 200409  

2011
Mary D. Stampone J. Ryan

Our objective was to understand and describe local spatial and temporal variability in precipitation around Kibale National Park, a tropical forest area of high conservation value. Continental or regional-scale trends are often relied upon to make policy and management decisions, but these analyses are often at too coarse a resolution to capture important variability at a finer scale where mana...

2007
Robert E. Nicholas David S. Battisti

A statistical approach is used to explore the variability of precipitation and meteorological drought in Mexico’s Rı́o Yaqui basin on seasonal-to-decadal timescales. For this purpose, a number of custom datasets have been developed, including a monthly 1900-2004 precipitation index for the Yaqui basin created by merging two gridded land-surface precipitation products, a 350-year tree-ring based ...

2005
Yang Hong Kuo-Lin Hsu Soroosh Sorooshian Xiaogang Gao

[1] Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks (PERSIANN) is a satellite infrared-based algorithm that produces global estimates of rainfall at resolutions of 0.25 0.25 and a half-hour. In this study the model parameters of PERSIANN are routinely adjusted using coincident rainfall derived from the Tropical Rainfall Measurement Mission Microwave Im...

2014
K. Guan S. P. Good K. K. Caylor H. Sato E. F. Wood

Introduction Conclusions References

2011
Marta Angulo-Martínez Santiago Beguería

Rainfall erosivity is the ability of precipitation to erode soil. Microerosion processes due to the impact of raindrops on the soil – rainsplash – represent an important mechanism of detachment of soil particles, which might be removed thereafter by surface runoff. The annual and interannual patterns of rainfall erosivity are controlled by the variability of rainfall intensity. This study analy...

2017
Salvatore Gabriele Francesco Chiaravalloti

The accurate evaluation of the precipitation’s time–spatial structure is a critical step for rainfall–runoff modelling. Particularly for small catchments, the variability of rainfall can lead to mismatched results. Large errors in flow evaluation may occur during convective storms, responsible for most of the flash floods in small catchments in the Mediterranean area. During such events, we may...

2008
Xiaogu Zheng Richard W. Katz

r a 200 .061 : +64 4 3 iwa.co.n Summary This study is devoted to simulation of the interannual variability of daily rainfall, such as the mean and variance of seasonal rainfall totals and the correlation between seasonal rainfall totals and a seasonal climate variable (e.g., an index of atmospheric or oceanic circulation). Prior work established that a mixture of chain-dependent processes, invo...

In this research wavelet coherence measure is implemented for evaluating the relations and effect of rainfall parameters over many years on runoff fluctuations that is for testing proposed linkages between two time series. In this way, monthly Hydro climatological as 3 rainfall stations, one runoff in the outlet of Ardabil plain were used. The results illustrate that 8-12 and 8-16 month modes o...

2015
Theodore L. Allen

of a dissertation at the University of Miami. Dissertation supervised by Professor Brian Mapes. No. of pages in text. (103) The annual rainfall cycle in the Caribbean is characterized by a bimodal pattern with peaks in the late spring (“early rainfall season”) and late summer (“late rainfall season”) with a mid-summer minimum (“mid-summer drought”). The time average rainfall pattern during the ...

Journal: :Remote Sensing 2016
Soukèye Cissé Laurence Eymard Catherine Ottlé Jacques André Ndione Amadou Thierno Gaye Françoise Pinsard

During the monsoon season, the spatiotemporal variability of rainfall impacts the growth of vegetation in the Sahel. This study evaluates this effect for the Ferlo basin in central northern Senegal. Relationships between rainfall, soil moisture (SM), and vegetation are assessed using remote sensing data (TRMM3B42 and RFE 2.0 for rainfall, ESA-CCI.SM for soil moisture and MODIS Leaf Area Index (...

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