Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases
Abstract It has been known that the tropical Pacific influences the Arctic through teleconnections but this relationship depends on the climate state. Here, we examine the influence of the tropical Pacific on summertime Arctic sea ice change under both increasing and decreasing CO2 concentrations us...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-07-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2025GL116352 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849245700474273792 |
|---|---|
| author | Eun‐Sook Heo Soon‐Il An Jongsoo Shin |
| author_facet | Eun‐Sook Heo Soon‐Il An Jongsoo Shin |
| author_sort | Eun‐Sook Heo |
| collection | DOAJ |
| description | Abstract It has been known that the tropical Pacific influences the Arctic through teleconnections but this relationship depends on the climate state. Here, we examine the influence of the tropical Pacific on summertime Arctic sea ice change under both increasing and decreasing CO2 concentrations using CESM1.2 model simulations. During global warming, the western tropical Pacific sea surface temperature (SST) warming induces a barotropic high pressure pattern in the central Arctic, leading to increased downward longwave radiation and enhanced sea ice loss. However, during global cooling, the teleconnection from the tropical Pacific weakens, reducing its impact on downward longwave radiation and sea ice recovery. This weakening of the relationship in the ramp‐down is attributed to a diminished local atmospheric meridional overturning circulation induced by the western tropical Pacific SST warming. Differences between ramp‐up and ramp‐down scenarios would enhance our understanding of the role of the tropical Pacific in future Arctic sea ice trends. |
| format | Article |
| id | doaj-art-d23584cd26014e3890c2c6116d7fdda2 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d23584cd26014e3890c2c6116d7fdda22025-08-20T03:58:44ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015214n/an/a10.1029/2025GL116352Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse GasesEun‐Sook Heo0Soon‐Il An1Jongsoo Shin2Division of Glacier and Earth Sciences Korea Polar Research Institute Incheon South KoreaDepartment of Atmospheric Sciences Yonsei University Seoul South KoreaWoods Hole Oceanographic Institution Woods Hole MA USAAbstract It has been known that the tropical Pacific influences the Arctic through teleconnections but this relationship depends on the climate state. Here, we examine the influence of the tropical Pacific on summertime Arctic sea ice change under both increasing and decreasing CO2 concentrations using CESM1.2 model simulations. During global warming, the western tropical Pacific sea surface temperature (SST) warming induces a barotropic high pressure pattern in the central Arctic, leading to increased downward longwave radiation and enhanced sea ice loss. However, during global cooling, the teleconnection from the tropical Pacific weakens, reducing its impact on downward longwave radiation and sea ice recovery. This weakening of the relationship in the ramp‐down is attributed to a diminished local atmospheric meridional overturning circulation induced by the western tropical Pacific SST warming. Differences between ramp‐up and ramp‐down scenarios would enhance our understanding of the role of the tropical Pacific in future Arctic sea ice trends.https://doi.org/10.1029/2025GL116352Arctic sea icetropical Pacific teleconnectionCDRMIPCO2 removal experiment |
| spellingShingle | Eun‐Sook Heo Soon‐Il An Jongsoo Shin Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases Geophysical Research Letters Arctic sea ice tropical Pacific teleconnection CDRMIP CO2 removal experiment |
| title | Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases |
| title_full | Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases |
| title_fullStr | Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases |
| title_full_unstemmed | Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases |
| title_short | Asymmetric Impact of the Tropical Pacific on Summertime Arctic Sea Ice Trends Under Increasing and Decreasing Greenhouse Gases |
| title_sort | asymmetric impact of the tropical pacific on summertime arctic sea ice trends under increasing and decreasing greenhouse gases |
| topic | Arctic sea ice tropical Pacific teleconnection CDRMIP CO2 removal experiment |
| url | https://doi.org/10.1029/2025GL116352 |
| work_keys_str_mv | AT eunsookheo asymmetricimpactofthetropicalpacificonsummertimearcticseaicetrendsunderincreasinganddecreasinggreenhousegases AT soonilan asymmetricimpactofthetropicalpacificonsummertimearcticseaicetrendsunderincreasinganddecreasinggreenhousegases AT jongsooshin asymmetricimpactofthetropicalpacificonsummertimearcticseaicetrendsunderincreasinganddecreasinggreenhousegases |