This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming
Abstract Greenhouse gases and cirrus clouds regulate outgoing longwave radiation (OLR) and cirrus cloud coverage is predicted to be sensitive to the ice fall speed which depends on ice crystal size. The higher the cirrus, the greater their impact is on OLR. Thus by changing ice crystal size in the c...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2009
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.8050 http://files.meetup.com/3936842/seeding.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1086.8050 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1086.8050 2023-05-15T17:51:29+02:00 This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming Res Lett The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.8050 http://files.meetup.com/3936842/seeding.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.8050 http://files.meetup.com/3936842/seeding.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://files.meetup.com/3936842/seeding.pdf text 2009 ftciteseerx 2020-05-24T00:15:50Z Abstract Greenhouse gases and cirrus clouds regulate outgoing longwave radiation (OLR) and cirrus cloud coverage is predicted to be sensitive to the ice fall speed which depends on ice crystal size. The higher the cirrus, the greater their impact is on OLR. Thus by changing ice crystal size in the coldest cirrus, OLR and climate might be modified. Fortunately the coldest cirrus have the highest ice supersaturation due to the dominance of homogeneous freezing nucleation. Seeding such cirrus with very efficient heterogeneous ice nuclei should produce larger ice crystals due to vapor competition effects, thus increasing OLR and surface cooling. Preliminary estimates of this global net cloud forcing are more negative than −2.8 W m −2 and could neutralize the radiative forcing due to a CO 2 doubling (3.7 W m −2 ). A potential delivery mechanism for the seeding material is already in place: the airline industry. Since seeding aerosol residence times in the troposphere are relatively short, the climate might return to its normal state within months after stopping the geoengineering experiment. The main known drawback to this approach is that it would not stop ocean acidification. It does not have many of the drawbacks that stratospheric injection of sulfur species has. Text Ocean acidification Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract Greenhouse gases and cirrus clouds regulate outgoing longwave radiation (OLR) and cirrus cloud coverage is predicted to be sensitive to the ice fall speed which depends on ice crystal size. The higher the cirrus, the greater their impact is on OLR. Thus by changing ice crystal size in the coldest cirrus, OLR and climate might be modified. Fortunately the coldest cirrus have the highest ice supersaturation due to the dominance of homogeneous freezing nucleation. Seeding such cirrus with very efficient heterogeneous ice nuclei should produce larger ice crystals due to vapor competition effects, thus increasing OLR and surface cooling. Preliminary estimates of this global net cloud forcing are more negative than −2.8 W m −2 and could neutralize the radiative forcing due to a CO 2 doubling (3.7 W m −2 ). A potential delivery mechanism for the seeding material is already in place: the airline industry. Since seeding aerosol residence times in the troposphere are relatively short, the climate might return to its normal state within months after stopping the geoengineering experiment. The main known drawback to this approach is that it would not stop ocean acidification. It does not have many of the drawbacks that stratospheric injection of sulfur species has. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Res Lett |
spellingShingle |
Res Lett This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming |
author_facet |
Res Lett |
author_sort |
Res |
title |
This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming |
title_short |
This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming |
title_full |
This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming |
title_fullStr |
This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming |
title_full_unstemmed |
This content has been downloaded from IOPscience. Please scroll down to see the full text. Modification of cirrus clouds to reduce global warming Modification of cirrus clouds to reduce global warming |
title_sort |
this content has been downloaded from iopscience. please scroll down to see the full text. modification of cirrus clouds to reduce global warming modification of cirrus clouds to reduce global warming |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.8050 http://files.meetup.com/3936842/seeding.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
http://files.meetup.com/3936842/seeding.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1086.8050 http://files.meetup.com/3936842/seeding.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766158654769201152 |