Articles | Volume 4, issue 2
Geosci. Instrum. Method. Data Syst., 4, 189–196, 2015
Geosci. Instrum. Method. Data Syst., 4, 189–196, 2015

Research article 12 Oct 2015

Research article | 12 Oct 2015

Global trend analysis of the MODIS drought severity index

P. I. Orvos et al.

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Cited articles

Alley, W. M.: The Palmer drought severity index: Limitations and assumptions, J. Climate Appl. Meteor., 23, 1100–1109, 1984.
Bai, Z. G., Dent, D. L., Olsson, L., and Schaepman, M. E.: Proxy global assessment of land degradation, Soil Use Manage., 24, 223–234, 2008.
Barbosa, H. A., Lakshmi Kumar, T. V., and Silva, L. R. M.: Recent trends in vegetation dynamics in the South America and their relationship to rainfall, Nat. Hazards, 77, 883–899, 2015.
Barreiro, M., Díaz, N., and Renom, M.: Role of the global oceans and land–atmosphere interaction on summertime interdecadal variability over northern Argentina, Clim. Dynam., 42, 1733–1753, 2014.
Benjamini, Y. and Hochberg, Y.: Controlling the false discovery rate – a practical and powerful approach to multiple testing, J. R. Stat. Soc. Ser. B-Methodol., 57, 289–300, 1995.
Short summary
The remotely sensed drought severity index (DSI) records compiled by Mu et al. (2013) exhibit significant local trends in several geographic areas. Since the interpretation of DSI values and trends depend on several local factors, standard field significance tests cannot provide more reliable results than the presented local trend survey. The observed continent-wide trends might be related to a slow (decadal) mode of climate variability, a link to global climate change cannot be established.