The climate hazards infrared precipitation with stations--a new environmental record for monitoring extremes.
Chris Funk,Pete Peterson,Martin Landsfeld,Diego Pedreros,James P. Verdin,Shraddhanand Shukla,Gregory Husak,James Rowland,Laura Harrison,Andrew Hoell,Joel Michaelsen +10 more
TLDR
The Variable Infiltration Capacity model, a novel blending procedure incorporating the spatial correlation structure of CCD-estimates to assign interpolation weights, is presented and it is shown that CHIRPS can support effective hydrologic forecasts and trend analyses in southeastern Ethiopia.Abstract:
The Climate Hazards group Infrared Precipitation with Stations (CHIRPS) dataset builds on previous approaches to ‘smart’ interpolation techniques and high resolution, long period of record precipitation estimates based on infrared Cold Cloud Duration (CCD) observations. The algorithm i) is built around a 0.05° climatology that incorporates satellite information to represent sparsely gauged locations, ii) incorporates daily, pentadal, and monthly 1981-present 0.05° CCD-based precipitation estimates, iii) blends station data to produce a preliminary information product with a latency of about 2 days and a final product with an average latency of about 3 weeks, and iv) uses a novel blending procedure incorporating the spatial correlation structure of CCD-estimates to assign interpolation weights. We present the CHIRPS algorithm, global and regional validation results, and show how CHIRPS can be used to quantify the hydrologic impacts of decreasing precipitation and rising air temperatures in the Greater Horn of Africa. Using the Variable Infiltration Capacity model, we show that CHIRPS can support effective hydrologic forecasts and trend analyses in southeastern Ethiopia.read more
Citations
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Identifying Ecosystem Function Shifts in Africa Using Breakpoint Analysis of Long-Term NDVI and RUE Data
TL;DR: This study presents an analysis of trends in vegetation productivity—measured using the Global Inventory Monitoring and Modelling System third generation (GIMMS3g) Normalised Difference Vegetation Index (NDVI) data—for African savannahs, over the 1982–2015 period, and highlights the importance of considering multiple options when undertaking trend analyses.
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Exploring trends in wet-season precipitation and drought indices in wet, humid and dry regions
Chris Funk,Chris Funk,Laura Harrison,Lisa V. Alexander,Pete Peterson,Ali Behrangi,Gregory Husak +6 more
TL;DR: In this paper, the authors describe the drivers of Drought program and the USAID Famine Early Warning Systems Network (FEWSN) for early warning systems in the Australian Research Council.
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Below-surface water mediates the response of African forests to reduced rainfall
Nima Madani,John S. Kimball,Nicholas C. Parazoo,Ashley P. Ballantyne,Torbern Tagesson,Lucas A. Jones,Rolf H. Reichle,Paul I. Palmer,Paul I. Palmer,Isabella Velicogna,Isabella Velicogna,A. Anthony Bloom,Sassan Saatchi,Zhihua Liu,Geruo A +14 more
TL;DR: In this article, a suite of satellite and other geospatial data was used to examine the responses of major ecosystems in Africa to anomalous rainfall events from 2003 to 2017, revealing that higher-than-average groundwater storage in tropical ecosystems offsets the rainfall deficit during the dry years.
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Beyond leaf habit: generalities in plant function across 97 tropical dry forest tree species.
G German Vargas,Timothy J. Brodribb,Juan Manuel Dupuy,Roy González-M.,Catherine M. Hulshof,David Medvigy,Tristan Allerton,Camila Pizano,Beatriz Salgado-Negret,Naomi B. Schwartz,Skip J. Van Bloem,Bonnie G. Waring,Jennifer S. Powers +12 more
TL;DR: In this article, the authors explored variation in hydraulic traits as a function of leaf habit for a large number of tropical dry forest trees and found that leaf habit alone does not explain patterns of trait variation, which suggests quantifying site-specific or species-specific uncertainty in trait variation as the way forward.
Journal ArticleDOI
Changes in Normalized Difference Vegetation Index in the Orinoco and Amazon River Basins: Links to Tropical Atlantic Surface Temperatures
Paola A. Arias,J. Alejandro Martínez,Juan David Botero Mejía,María José Pazos,Jhan Carlo Espinoza,Sly Wongchuig-Correa +5 more
TL;DR: In this article, the observed relationship between sea surface temperatures (SSTs) over the Atlantic Ocean and the normalized difference vegetation index (NDVI) in the Orinoco and Amazon basins was analyzed.
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