Active thermokarst regions contain rich sources of ice-nucleating particles
Rapid Arctic climate warming, amplified relative to lower-latitude regions, has led to permafrost thaw and associated thermokarst processes. Recent work has shown permafrost is a rich source of ice-nucleating particles (INPs) that can initiate ice formation in supercooled liquid clouds. Since the ph...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-23-15783-2023 https://acp.copernicus.org/articles/23/15783/2023/ |
id |
ftcopernicus:oai:publications.copernicus.org:acp112013 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:acp112013 2024-09-09T19:21:57+00:00 Active thermokarst regions contain rich sources of ice-nucleating particles Barry, Kevin R. Hill, Thomas C. J. Nieto-Caballero, Marina Douglas, Thomas A. Kreidenweis, Sonia M. DeMott, Paul J. Creamean, Jessie M. 2023-12-22 application/pdf https://doi.org/10.5194/acp-23-15783-2023 https://acp.copernicus.org/articles/23/15783/2023/ eng eng doi:10.5194/acp-23-15783-2023 https://acp.copernicus.org/articles/23/15783/2023/ eISSN: 1680-7324 Text 2023 ftcopernicus https://doi.org/10.5194/acp-23-15783-2023 2024-08-28T05:24:15Z Rapid Arctic climate warming, amplified relative to lower-latitude regions, has led to permafrost thaw and associated thermokarst processes. Recent work has shown permafrost is a rich source of ice-nucleating particles (INPs) that can initiate ice formation in supercooled liquid clouds. Since the phase of Arctic clouds strongly affects the surface energy budget, especially over ice-laden surfaces, characterizing INP sources in this region is critical. For the first time, we provide a large-scale survey of potential INP sources in tundra terrain where thermokarst processes are active and relate to INPs in the air. Permafrost, seasonally thawed active layer, ice wedge, vegetation, water, and aerosol samples were collected near Utqiaġvik, Alaska, in late summer and analyzed for their INP contents. Permafrost was confirmed as a rich source of INPs that was enhanced near the coast. Sensitivity to heating revealed differences in INPs from similar sources, such as the permafrost and active layer. Water, vegetation, and ice wedge INPs had the highest heat-labile percentage. The aerosol likely contained a mixture of known and unsurveyed INP types that were inferred as biological. Arctic water bodies were shown to be potential important links of sources to the atmosphere in thermokarst regions. Therefore, a positive relationship found with total organic carbon considering all water bodies gives a mechanism for future parameterization as permafrost continues to thaw and drive regional landscape shifts. Text Arctic Ice permafrost Thermokarst Tundra wedge* Alaska Copernicus Publications: E-Journals Arctic Atmospheric Chemistry and Physics 23 24 15783 15793 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Rapid Arctic climate warming, amplified relative to lower-latitude regions, has led to permafrost thaw and associated thermokarst processes. Recent work has shown permafrost is a rich source of ice-nucleating particles (INPs) that can initiate ice formation in supercooled liquid clouds. Since the phase of Arctic clouds strongly affects the surface energy budget, especially over ice-laden surfaces, characterizing INP sources in this region is critical. For the first time, we provide a large-scale survey of potential INP sources in tundra terrain where thermokarst processes are active and relate to INPs in the air. Permafrost, seasonally thawed active layer, ice wedge, vegetation, water, and aerosol samples were collected near Utqiaġvik, Alaska, in late summer and analyzed for their INP contents. Permafrost was confirmed as a rich source of INPs that was enhanced near the coast. Sensitivity to heating revealed differences in INPs from similar sources, such as the permafrost and active layer. Water, vegetation, and ice wedge INPs had the highest heat-labile percentage. The aerosol likely contained a mixture of known and unsurveyed INP types that were inferred as biological. Arctic water bodies were shown to be potential important links of sources to the atmosphere in thermokarst regions. Therefore, a positive relationship found with total organic carbon considering all water bodies gives a mechanism for future parameterization as permafrost continues to thaw and drive regional landscape shifts. |
format |
Text |
author |
Barry, Kevin R. Hill, Thomas C. J. Nieto-Caballero, Marina Douglas, Thomas A. Kreidenweis, Sonia M. DeMott, Paul J. Creamean, Jessie M. |
spellingShingle |
Barry, Kevin R. Hill, Thomas C. J. Nieto-Caballero, Marina Douglas, Thomas A. Kreidenweis, Sonia M. DeMott, Paul J. Creamean, Jessie M. Active thermokarst regions contain rich sources of ice-nucleating particles |
author_facet |
Barry, Kevin R. Hill, Thomas C. J. Nieto-Caballero, Marina Douglas, Thomas A. Kreidenweis, Sonia M. DeMott, Paul J. Creamean, Jessie M. |
author_sort |
Barry, Kevin R. |
title |
Active thermokarst regions contain rich sources of ice-nucleating particles |
title_short |
Active thermokarst regions contain rich sources of ice-nucleating particles |
title_full |
Active thermokarst regions contain rich sources of ice-nucleating particles |
title_fullStr |
Active thermokarst regions contain rich sources of ice-nucleating particles |
title_full_unstemmed |
Active thermokarst regions contain rich sources of ice-nucleating particles |
title_sort |
active thermokarst regions contain rich sources of ice-nucleating particles |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-23-15783-2023 https://acp.copernicus.org/articles/23/15783/2023/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Thermokarst Tundra wedge* Alaska |
genre_facet |
Arctic Ice permafrost Thermokarst Tundra wedge* Alaska |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-23-15783-2023 https://acp.copernicus.org/articles/23/15783/2023/ |
op_doi |
https://doi.org/10.5194/acp-23-15783-2023 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
23 |
container_issue |
24 |
container_start_page |
15783 |
op_container_end_page |
15793 |
_version_ |
1809762223656009728 |