Widening and weakening of the Hadley circulation under global warming
Yongyun Hu,Han Huang,Chen Zhou +2 more
TLDR
A review of the major progresses of studies in trends in width and strength of the Hadley circulation can be found in this paper, where the authors address answers to these questions, clarify inconsistent results, and propose ideas for future studies.Abstract:
The Hadley circulation is one of the most important atmospheric circulations. Widening of the Hadley circulation has drawn extensive studies in the past decade. The key concern is that widening of the Hadley circulation would cause poleward shift of the subtropical dry zone. Various metrics have been applied to measure the widening of the tropics. What are responsible for the observed widening trends of the Hadley circulation? How anthropogenic and natural forcings caused the widening? How the widening results in regional climatic effects? These are the major questions in studing the widening of the Hadley circulation. While both observations and simulations all show widening of the Hadley circulation in the past few decades, there are no general agreements of changes in the strength of the Hadley circulation. Although some reanalysis datasets show strengthening of the Hadley circulation, it was shown that the strengthening trend could be artificial, and simulations show weakening of the Hadley circulation for global greenhouse warming. In the present paper, we shall briefly review the major progresses of studies in trends in width and strength of the Hadley circulation. We address answers to these questions, clarify inconsistent results, and propose ideas for future studies.read more
Citations
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Response of the zonal mean atmospheric circulation to El Nino versus global warming
TL;DR: In contrast to the strengthening and contraction of the Hadley cell and the equatorward shift of the tropospheric zonal jets in response to El Nino forcing, the hadley cell weakens and expands poleward, and the jets move poleward in a warmed climate, despite the projected “El Nino-like” enhanced warming over the equatorial central and eastern Pacific.
Journal ArticleDOI
Meteorology and Climate Influences on Tropospheric Ozone: a Review of Natural Sources, Chemistry, and Transport Patterns
TL;DR: In this paper, the authors summarized three dominant pathways of meteorological and climatic impacts on tropospheric ozone and present their recent progress, including changes in the natural precursor emissions, the kinetics and partitioning of chemistry and deposition, and the transport of ozone and its precursors.
Journal ArticleDOI
The South Atlantic Subtropical Anticyclone: Present and Future Climate
Michelle Simões Reboita,Tércio Ambrizzi,Bruna Andrelina Silva,Raniele Fátima Pinheiro,Rosmeri Porfírio da Rocha +4 more
TL;DR: In this article, a review of the literature on the South Atlantic Subtropical Anticyclone (SASA) including the drivers of the semi-permanent anticyclones and the main features of the SASA in the future climate obtained through the projections of three global climate models (HadGEM2-ES, GFDL-ESM2M and MPI-ESm-MR) from the Coupled Model Intercomparison Project (CMIP5), using the Representative Concentration Pathway 8.5 (RCP8.5) scenario
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Surface and tropospheric ozone trends in the Southern Hemisphere since 1990: possible linkages to poleward expansion of the Hadley circulation
Xiao Lu,Xiao Lu,Lin Zhang,Yuanhong Zhao,Daniel J. Jacob,Yongyun Hu,Lu Hu,Meng Gao,Xiong Liu,Irina Petropavlovskikh,Irina Petropavlovskikh,Audra McClure-Begley,Audra McClure-Begley,Richard Querel +13 more
TL;DR: In this paper, in-situ and satellite observations document increases of tropospheric ozone in the Southern Hemisphere (SH) over 1990-2015 and use a global chemical transport model to diagnose drivers of these trends.
Journal ArticleDOI
Strong link between large tropical volcanic eruptions and severe droughts prior to monsoon in the central Himalayas revealed by tree-ring records
Eryuan Liang,Binod Dawadi,Neil Pederson,Shilong Piao,Shilong Piao,Haifeng Zhu,Shalik Ram Sigdel,Deliang Chen,Deliang Chen +8 more
TL;DR: Using a tree-ring network of precisely dated Himalayan birch in the central Himalayas, the authors reconstructed variations in the regional pre-monsoon precipitation back to 1650 CE.
References
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Journal ArticleDOI
Expansion of the Hadley cell under global warming
TL;DR: In this paper, a scaling analysis supports the notion that the poleward extent of the Hadley cell is set by the location where the thermally driven jet first becomes baroclinically unstable.
Detection and attribution of climate change: from global to regional
Nathaniel L. Bindoff,Peter A. Stott,M AchutaRao,Allen,Nathan P. Gillett,David S. Gutzler,K. Hansingo,Gabriele C. Hegerl,Yongyun Hu,S. Jain,Mokhov,James E. Overland,Judith Perlwitz,R. Sebbari,Xuebin Zhang +14 more
TL;DR: In this article, the causes of observed changes assessed in Chapters 2 to 5 and uses understanding of physical processes, climate models and statistical approaches are used to assess the extent to which atmospheric and oceanic changes influence ecosystems, infrastructure, human health and activities in economic sectors.
Journal ArticleDOI
Stratospheric Ozone Depletion: The Main Driver of Twentieth-Century Atmospheric Circulation Changes in the Southern Hemisphere
TL;DR: In this article, the importance of stratospheric ozone depletion on the atmospheric circulation of the troposphere is studied with an atmospheric general circulation model, the Community Atmospheric Model, version 3 (CAM3), for the second half of the twentieth century.
Journal ArticleDOI
Observed poleward expansion of the Hadley circulation since 1979
Yongyun Hu,Qinjun Fu +1 more
TL;DR: In this paper, the authors show that the Hadley circulation has a significant expansion of about 2 to 4.5 degrees of latitude since 1979, leading to enhanced mid-latitude tropospheric warming and poleward shifts of the subtropical dry zone.
Journal ArticleDOI
Increased dry-season length over southern Amazonia in recent decades and its implication for future climate projection
Rong Fu,Lei Yin,Wenhong Li,Paola A. Arias,Robert E. Dickinson,Lei Huang,Sudip Chakraborty,Katia Fernandes,Brant Liebmann,Rosie A. Fisher,Ranga B. Myneni +10 more
TL;DR: It is observed that the dry-season length over southern Amazonia has increased significantly since 1979, primarily owing to a delay of its ending dates (dry-season end, DSE), and is accompanied by a prolonged fire season.
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