Analysis of rainfall seasonality from observations and climate models

Verfasser / Beitragende:
[Salvatore Pascale, Valerio Lucarini, Xue Feng, Amilcare Porporato, Shabeh ul Hasson]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 44/11-12(2015-06-01), 3281-3301
Format:
Artikel (online)
ID: 605474729
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024 7 0 |a 10.1007/s00382-014-2278-2  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-014-2278-2 
245 0 0 |a Analysis of rainfall seasonality from observations and climate models  |h [Elektronische Daten]  |c [Salvatore Pascale, Valerio Lucarini, Xue Feng, Amilcare Porporato, Shabeh ul Hasson] 
520 3 |a Two new indicators of rainfall seasonality based on information entropy, the relative entropy (RE) and the dimensionless seasonality index (DSI), together with the mean annual rainfall, are evaluated on a global scale for recently updated precipitation gridded datasets and for historical simulations from coupled atmosphere-ocean general circulation models. The RE provides a measure of the number of wet months and, for precipitation regimes featuring a distinct wet and dry season, it isdirectly related to the duration of the wet season. The DSI combines the rainfall intensity with its degree of seasonality and it is an indicator of the extent of the global monsoon region. We show that the RE and the DSI are fairly independent of the time resolution of the precipitation data, thereby allowing objective metrics for model intercomparison and ranking. Regions with different precipitation regimes are classified and characterized in terms of RE and DSI. Comparison of different land observational datasets reveals substantial difference in their local representation of seasonality. It is shown that two-dimensional maps of RE provide an easy way to compare rainfall seasonality from various datasets and to determine areas of interest. Models participating to the Coupled Model Intercomparison Project platform, Phase 5, consistently overestimate the RE over tropical Latin America and underestimate it in West Africa, western Mexico and East Asia. It is demonstrated that positive RE biases in a general circulation model are associated with excessively peaked monthly precipitation fractions, too large during the wet months and too small in the months preceding and following the wet season; negative biases are instead due, in most cases, to an excess of rainfall during the premonsoonal months. 
540 |a Springer-Verlag Berlin Heidelberg, 2014 
690 7 |a Rainfall seasonality  |2 nationallicence 
690 7 |a Information entropy  |2 nationallicence 
690 7 |a Hydrological cycle  |2 nationallicence 
690 7 |a CMIP5 models  |2 nationallicence 
700 1 |a Pascale  |D Salvatore  |u Meteorologisches Institute, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany  |4 aut 
700 1 |a Lucarini  |D Valerio  |u Meteorologisches Institute, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany  |4 aut 
700 1 |a Feng  |D Xue  |u Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA  |4 aut 
700 1 |a Porporato  |D Amilcare  |u Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA  |4 aut 
700 1 |a Hasson  |D Shabeh ul  |u Meteorologisches Institute, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 44/11-12(2015-06-01), 3281-3301  |x 0930-7575  |q 44:11-12<3281  |1 2015  |2 44  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-014-2278-2  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00382-014-2278-2  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Pascale  |D Salvatore  |u Meteorologisches Institute, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Lucarini  |D Valerio  |u Meteorologisches Institute, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Feng  |D Xue  |u Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Porporato  |D Amilcare  |u Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Hasson  |D Shabeh ul  |u Meteorologisches Institute, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Grindelberg 5, 20144, Hamburg, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 44/11-12(2015-06-01), 3281-3301  |x 0930-7575  |q 44:11-12<3281  |1 2015  |2 44  |o 382