Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land
Abstract Here we demonstrate that changes of the North Atlantic subtropical high and its regional rainfall pattern during mid‐Holocene precessional changes and idealized 4xCO2 increase can both be understood as a remote response to increased land heating near North Africa. Despite different sources...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-04-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/2017GL076669 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849716120491130880 |
|---|---|
| author | Patrick Kelly Ben Kravitz Jian Lu L. Ruby Leung |
| author_facet | Patrick Kelly Ben Kravitz Jian Lu L. Ruby Leung |
| author_sort | Patrick Kelly |
| collection | DOAJ |
| description | Abstract Here we demonstrate that changes of the North Atlantic subtropical high and its regional rainfall pattern during mid‐Holocene precessional changes and idealized 4xCO2 increase can both be understood as a remote response to increased land heating near North Africa. Despite different sources and patterns of radiative forcing (increase in CO2 concentration versus changes in orbital parameters), we find that the pattern of energy, circulation, and rainfall responses in the Northern Hemisphere summer subtropics are remarkably similar in the two forcing scenarios because both are dominated by the same land‐sea heating contrast in response to the forcing. An increase in energy input over arid land drives a westward displacement of the coupled North Atlantic subtropical high‐monsoon circulation, consistent with increased precipitation in the Afro‐Asia region and decreased precipitation in the America‐Atlantic region. This study underscores the importance of land heating in dictating remote drying through zonal shifts of the subtropical circulation. |
| format | Article |
| id | doaj-art-efaa9d11da0c4f518ce3e64b1743eb10 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-efaa9d11da0c4f518ce3e64b1743eb102025-08-20T03:13:07ZengWileyGeophysical Research Letters0094-82761944-80072018-04-014583615362410.1002/2017GL076669Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over LandPatrick Kelly0Ben Kravitz1Jian Lu2L. Ruby Leung3Atmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USAAtmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USAAtmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USAAtmospheric Sciences and Global Change Division Pacific Northwest National Laboratory Richland WA USAAbstract Here we demonstrate that changes of the North Atlantic subtropical high and its regional rainfall pattern during mid‐Holocene precessional changes and idealized 4xCO2 increase can both be understood as a remote response to increased land heating near North Africa. Despite different sources and patterns of radiative forcing (increase in CO2 concentration versus changes in orbital parameters), we find that the pattern of energy, circulation, and rainfall responses in the Northern Hemisphere summer subtropics are remarkably similar in the two forcing scenarios because both are dominated by the same land‐sea heating contrast in response to the forcing. An increase in energy input over arid land drives a westward displacement of the coupled North Atlantic subtropical high‐monsoon circulation, consistent with increased precipitation in the Afro‐Asia region and decreased precipitation in the America‐Atlantic region. This study underscores the importance of land heating in dictating remote drying through zonal shifts of the subtropical circulation.https://doi.org/10.1002/2017GL07666933053373334433373322 |
| spellingShingle | Patrick Kelly Ben Kravitz Jian Lu L. Ruby Leung Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land Geophysical Research Letters 3305 3373 3344 3337 3322 |
| title | Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land |
| title_full | Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land |
| title_fullStr | Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land |
| title_full_unstemmed | Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land |
| title_short | Remote Drying in the North Atlantic as a Common Response to Precessional Changes and CO2 Increase Over Land |
| title_sort | remote drying in the north atlantic as a common response to precessional changes and co2 increase over land |
| topic | 3305 3373 3344 3337 3322 |
| url | https://doi.org/10.1002/2017GL076669 |
| work_keys_str_mv | AT patrickkelly remotedryinginthenorthatlanticasacommonresponsetoprecessionalchangesandco2increaseoverland AT benkravitz remotedryinginthenorthatlanticasacommonresponsetoprecessionalchangesandco2increaseoverland AT jianlu remotedryinginthenorthatlanticasacommonresponsetoprecessionalchangesandco2increaseoverland AT lrubyleung remotedryinginthenorthatlanticasacommonresponsetoprecessionalchangesandco2increaseoverland |