A semiparametric multivariate and multisite weather generator

Somkiat Apipattanavis, Guillermo P Podesta, Balaji Rajagopalan, Richard W. Katz

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

We propose a semiparametric multivariate weather generator with greater ability to reproduce the historical statistics, especially the wet and dry spells. The proposed approach has two steps: (1) a Markov Chain for generating the precipitation state (i.e., no rain, rain, or heavy rain), and (2) a k-nearest neighbor (k-NN) bootstrap resampler for generating the multivariate weather variables. The Markov Chain captures the spell statistics while the k-NN bootstrap captures the distributional and lag-dependence statistics of the weather variables. Traditional k-NN generators tend to under-simulate the wet and dry spells that are keys to watershed and agricultural modeling for water planning and management; hence the motivation for this research. We demonstrate the utility of the proposed approach and its improvement over the traditional k-NN approach through an application to daily weather data from Pergamino in the Pampas region of Argentina. We show the applicability of the proposed framework in simulating weather scenarios conditional on the seasonal climate forecast and also at multiple sites in the Pampas region.

Original languageEnglish (US)
Article numberW11401
JournalWater Resources Research
Volume43
Issue number11
DOIs
StatePublished - Nov 2007

Fingerprint

Rain
weather
Statistics
Pampas region
Markov processes
statistics
rain
Markov chain
Precipitation (meteorology)
Watersheds
agricultural modeling
water planning
meteorological data
Planning
Argentina
Water
planning
water management
climate
watershed

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Aquatic Science
  • Water Science and Technology

Cite this

A semiparametric multivariate and multisite weather generator. / Apipattanavis, Somkiat; Podesta, Guillermo P; Rajagopalan, Balaji; Katz, Richard W.

In: Water Resources Research, Vol. 43, No. 11, W11401, 11.2007.

Research output: Contribution to journalArticle

Apipattanavis, Somkiat ; Podesta, Guillermo P ; Rajagopalan, Balaji ; Katz, Richard W. / A semiparametric multivariate and multisite weather generator. In: Water Resources Research. 2007 ; Vol. 43, No. 11.
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