Global energetics and local physics as drivers of past, present and future monsoons - LABORATOIRE DES SCIENCES DU CLIMAT ET DE L'ENVIRONNEMENT (LSCE) - UMR CNRS 8212 Accéder directement au contenu
Article Dans Une Revue Nature Geoscience Année : 2018

Global energetics and local physics as drivers of past, present and future monsoons

Résumé

Global constraints on momentum and energy govern the variability of the rainfall belt in the intertropical convergence zone and the structure of the zonal mean tropical circulation. The continental-scale monsoon systems are also facets of a momentum- and energy-constrained global circulation, but their modern and palaeo variability deviates substantially from that of the intertropical convergence zone. The mechanisms underlying deviations from expectations based on the longitudinal mean budgets are neither fully understood nor simulated accurately. We argue that a framework grounded in global constraints on energy and momentum yet encompassing the complexities of monsoon dynamics is needed to identify the causes of the mismatch between theory, models and observations, and ultimately to improve regional climate projections. In a first step towards this goal, disparate regional processes must be distilled into gross measures of energy flow in and out of continents and between the surface and the tropopause, so that monsoon dynamics may be coherently diagnosed across modern and palaeo observations and across idealized and comprehensive simulations. Accounting for zonal asymmetries in the circulation, land/ocean differences in surface fluxes, and the character of convective systems, such a monsoon framework would integrate our understanding at all relevant scales: from the fine details of how moisture and energy are lifted in the updrafts of thunderclouds, up to the global circulations.
Fichier principal
Vignette du fichier
BiVoBoBr18.pdf (2.39 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

cea-01882973 , version 1 (01-06-2023)

Identifiants

Citer

Michela Biasutti, Aiko Voigt, William R. Boos, Pascale Braconnot, Julia C. Hargreaves, et al.. Global energetics and local physics as drivers of past, present and future monsoons. Nature Geoscience, 2018, 11, pp.392 - 400. ⟨10.1038/s41561-018-0137-1⟩. ⟨cea-01882973⟩
121 Consultations
49 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More