Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean
In the summer Arctic, bump-like vertical temperature profiles of the upper layer in the Canada Basin suggest a near-surface temperature maximum (NSTM) beneath the mixed layer. This paper concentrates on describing the decadal variance of these NSTMs. Essentially, the temporal evolution of the summer...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Stockholm University Press
2019-01-01
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| Series: | Tellus: Series A, Dynamic Meteorology and Oceanography |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/16000870.2019.1591856 |
| _version_ | 1818040198968115200 |
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| author | Long Lin Hailun He |
| author_facet | Long Lin Hailun He |
| author_sort | Long Lin |
| collection | DOAJ |
| description | In the summer Arctic, bump-like vertical temperature profiles of the upper layer in the Canada Basin suggest a near-surface temperature maximum (NSTM) beneath the mixed layer. This paper concentrates on describing the decadal variance of these NSTMs. Essentially, the temporal evolution of the summer NSTM revealed three decadal phases. The first period is before 2003, when the summer NSTM could rarely be observed except around the marginal of the Canada Basin. The second period is between 2003 and 2015, when the summer NSTM nearly occurred over the whole basin as accelerated decline of summer sea ice. The third period is from 2016 to 2017, when the summer NSTM almost disappeared due to prevailing warm surface water. Furthermore, for the background behind the decadal variance of summer NSTM, linear trends of the September minimum sea ice extent and surface water heat content in the Canada Basin from 2003 to 2017 were –2.75 ± 1.08 × 104 km2yr−1 and 2.29 ± 1.36 MJ m−2yr−1, respectively. According to a previous theory, if we assume that the trend of the summer surface water heat content was only contributed by NSTM, it would cause a decrease in sea ice thickness of approximately 13 cm. The analysis partially explains the reason for sea ice decline in recent years. |
| first_indexed | 2024-12-10T08:10:43Z |
| format | Article |
| id | doaj.art-fbb6e9f5d3be42e2bd702333e68c45e5 |
| institution | Directory Open Access Journal |
| issn | 1600-0870 |
| language | English |
| last_indexed | 2024-12-10T08:10:43Z |
| publishDate | 2019-01-01 |
| publisher | Stockholm University Press |
| record_format | Article |
| series | Tellus: Series A, Dynamic Meteorology and Oceanography |
| spelling | doaj.art-fbb6e9f5d3be42e2bd702333e68c45e52022-12-22T01:56:35ZengStockholm University PressTellus: Series A, Dynamic Meteorology and Oceanography1600-08702019-01-0171110.1080/16000870.2019.15918561591856Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic OceanLong Lin0Hailun He1Second Institute of Oceanography, Ministry of Natural ResourcesSecond Institute of Oceanography, Ministry of Natural ResourcesIn the summer Arctic, bump-like vertical temperature profiles of the upper layer in the Canada Basin suggest a near-surface temperature maximum (NSTM) beneath the mixed layer. This paper concentrates on describing the decadal variance of these NSTMs. Essentially, the temporal evolution of the summer NSTM revealed three decadal phases. The first period is before 2003, when the summer NSTM could rarely be observed except around the marginal of the Canada Basin. The second period is between 2003 and 2015, when the summer NSTM nearly occurred over the whole basin as accelerated decline of summer sea ice. The third period is from 2016 to 2017, when the summer NSTM almost disappeared due to prevailing warm surface water. Furthermore, for the background behind the decadal variance of summer NSTM, linear trends of the September minimum sea ice extent and surface water heat content in the Canada Basin from 2003 to 2017 were –2.75 ± 1.08 × 104 km2yr−1 and 2.29 ± 1.36 MJ m−2yr−1, respectively. According to a previous theory, if we assume that the trend of the summer surface water heat content was only contributed by NSTM, it would cause a decrease in sea ice thickness of approximately 13 cm. The analysis partially explains the reason for sea ice decline in recent years.http://dx.doi.org/10.1080/16000870.2019.1591856near-surface temperature maximumheat contentcanada basinarctic ocean |
| spellingShingle | Long Lin Hailun He Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean Tellus: Series A, Dynamic Meteorology and Oceanography near-surface temperature maximum heat content canada basin arctic ocean |
| title | Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean |
| title_full | Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean |
| title_fullStr | Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean |
| title_full_unstemmed | Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean |
| title_short | Decadal variance of summer near-surface temperature maximum in Canada Basin of Arctic Ocean |
| title_sort | decadal variance of summer near surface temperature maximum in canada basin of arctic ocean |
| topic | near-surface temperature maximum heat content canada basin arctic ocean |
| url | http://dx.doi.org/10.1080/16000870.2019.1591856 |
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