Thermohaline water structure on the southwestern Chukchi Sea shelf under conditions of opposite regimes of atmospheric circulation in summer periods of 2003 and 2007

Ванин, Н. С.

doi:10.3103/s106837391007006x

Cited by 5 publications

(7 citation statements)

References 12 publications

(20 reference statements)

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“…The summer sea surface temperature in the Chukchi Sea is normally 4-6°C, but it reached 12°C in 2007 (Vanin, 2010;Matsuno et al, 2012). The retreat of sea ice in early summer 2007 (Markus et al, 2009) and enhanced solar heating (Mizobata et al, 2010;Vanin, 2010), among other factors, contributed to this anomalously high temperature.…”

Section: Perspectives On Arctic Ecosystem Researchmentioning

confidence: 95%

Review: Potential catastrophic reduction of sea ice in the western Arctic Ocean: Its impact on biogeochemical cycles and marine ecosystems

Harada

2016

Global and Planetary Change

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a b s t r a c tThe reduction of sea ice in the Arctic Ocean, which has progressed more rapidly than previously predicted, has the potential to cause multiple environmental stresses, including warming, acidification, and strengthened stratification of the ocean. Observational studies have been undertaken to detect the impacts on biogeochemical cycles and marine ecosystems of these environmental stresses in the Arctic Ocean. Satellite analyses show that the reduction of sea ice has been especially great in the western Arctic Ocean. Observations and model simulations have both helped to clarify the impact of sea-ice reductions on the dynamics of ecosystem processes and biogeochemical cycles. In this review, I focus on the western Arctic Ocean, which has experienced the most rapid retreat of sea ice in the Arctic Ocean and, very importantly, has a higher rate of primary production than any other area of the Arctic Ocean owing to the supply of nutrient-rich Pacific water. I report the impact of the current reduction of sea ice on marine biogeochemical cycles in the western Arctic Ocean, including lower-trophic-level organisms, and identify the key mechanism of changes in the biogeochemical cycles, based on published observations and model simulations. The retreat of sea ice has enhanced primary production and has increased the frequency of appearance of mesoscale anticyclonic eddies. These eddies enhance the light environment and replenish nutrients, and they also represent a mechanism that can increase the rate of the biological pump in the Arctic Ocean. Various unresolved issues that require further investigation, such as biological responses to environmental stressors such as ocean acidification, are also discussed.

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Section: Perspectives On Arctic Ecosystem Researchmentioning

confidence: 95%

Review: Potential catastrophic reduction of sea ice in the western Arctic Ocean: Its impact on biogeochemical cycles and marine ecosystems

Harada

2016

Global and Planetary Change

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“…In this study, significantly higher sea surface salinity in 2007 would be caused by the greater intrusion of Pacific Water at that year (Figure 2). In terms of temperature, the highest sea surface temperature in 2007 (Figure 2) would be caused by the early timing of sea ice reduction (Markus et al, 2009), and intensive solar heating by a stationary presence of anticyclonic circulation over the Chukchi Sea at that year (Mizobata et al, 2010;Vanin, 2010).…”

Section: Zooplankton Communitymentioning

confidence: 99%

“…Based on satellite observations during 1991−2007, both the volume and temperature of the Pacific Water that passed through the Bering Strait was highest in 2007 when the sea ice extent was the least (Woodgate et al, 2010). The sea surface temperature in the Chukchi Sea is normally 4−6°C, yet rose up to 12°C in 2007 (Vanin, 2010). This anomalously high temperature in 2007 is considered to be caused by the early sea ice reduction (Markus et al, 2009), and also the intensive solar heating by a stationary presence of anticyclonic circulation over the Chukchi Sea in that year (Mizobata et al, 2010;Vanin, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…The sea surface temperature in the Chukchi Sea is normally 4−6°C, yet rose up to 12°C in 2007 (Vanin, 2010). This anomalously high temperature in 2007 is considered to be caused by the early sea ice reduction (Markus et al, 2009), and also the intensive solar heating by a stationary presence of anticyclonic circulation over the Chukchi Sea in that year (Mizobata et al, 2010;Vanin, 2010). Such drastic changes in recent hydrography in this region are considered to have a great effect on the marine ecosystem, especially on plankton community (Grebmeier et al, 2006;Hunt and Drinkwater, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Biomass size spectra of mesozooplankton in the Chukchi Sea during the summers of 1991/1992 and 2007/2008: an analysis using optical plankton counter data

Matsuno

Yamaguchi

Imai

2012

ICES Journal of Marine Science

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Matsuno, K., Yamaguchi, A., and Imai, I. 2012. Biomass size spectra of mesozooplankton in the Chukchi Sea during the summers of 1991/1992 and 2007/2008: an analysis using optical plankton counter data. – ICES Journal of Marine Science, 69: . An optical plankton counter was used to examine the regional characteristics of the zooplankton communities in the Chukchi Sea during the summers of 1991, 1992, 2007, and 2008. Zooplankton abundance and biomass ranged from 5000 to 1 170 000 ind. m−2 and 0.2 to 10.9 g dry mass m−2, respectively. Based on zooplankton biovolume in equivalent spherical diameter (ESD) in 48 bins, one every 0.1 mm between 0.25 and 5.0 mm, a Bray–Curtis cluster analysis classified zooplankton communities into four groups (A–D). No changes were observed in zooplankton communities south of the Lisburne Peninsula (group A) throughout the 4 years, but there were differences north of the Peninsula, with group B (normal, intermediate biomass) observed in 1991/1992, group D (low biomass) in 2007, and group C (predominance of barnacle larvae) in 2008. Analysis of the normalized biomass size spectra for the groups indicated that groups A and C were very productive, so the zooplankton community south of the Lisburne Peninsula was consistently highly productive, which may be because of the continuous inflow of Pacific Water rich in nutrients. Zooplankton communities north of the Lisburne Peninsula varied greatly from year to year, which may be related to interannual changes in sea-ice extent.

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“…At the same time, due to the relatively low number of measurements, the water masses distribution and related salinity patterns in the western part of the Chukchi Sea remain poorly studied. However, several studies [12,[16][17][18] point to the existence of strong interannual variability of these characteristics. For example, Alaskan waters penetrated into the western part of the sea in 2008 and 2009 [16] but were absent in 2004 [12].…”

Section: Introductionmentioning

confidence: 99%

Interannual Variability of Salinity in the Chukchi Sea and Its Relationships with the Dynamics of the East Siberian Current during 1993–2020

Zhuk,

Kubryakov

2023

Remote Sensing

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The interannual features of the salinity in the Chukchi Sea during the ice-free period of a year are investigated on the base of Soil Moisture Active Passive (SMAP) satellite measurements and GLORYS12v1 reanalysis data. Analysis of salinity measurements revealed two types of Bering Summer Waters (BSW) propagation: “western” and “eastern”. The first is characterized by the penetration of Pacific waters into the northwest part of the sea, as well as the propagation of BSW to 180°W and 72.5°N. During the “eastern” type, salty waters are pressed to the eastern part of the shelf. Their area decreases and the northern boundary of the BSW area shifts to 174–176°W. Areas with low salinity, ~29 psu, are observed in the western part of the sea. Our study reveals that the formation of these types is affected not only by the inflow of Pacific waters through the Bering Strait but also by the East Siberian Current (ESC). Both factors are related and lead to correlated changes in the salinity of the Chukchi Sea waters. ESC carries Arctic freshwaters from west to east and leads to a decrease in salinity in the western part of the sea. At the same time, southward ESC caused the blockage of the northward currents in the Bering Strait and a decrease in the influx of saline Pacific waters in the southern part of the Chukchi Sea. The intensification of ESC occurred in 1994, 2002, 2012, and 2016, when the volume transport of ESC increased by approximately 0.2 Sv, while the influx through the Bering Strait decreased. As a result, in the years with intense ESC, the spatial structure of the salinity of the Chukchi Sea changed significantly and the shelf-averaged salinity decreased by 0.3–0.5 psu.

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Thermohaline water structure on the southwestern Chukchi Sea shelf under conditions of opposite regimes of atmospheric circulation in summer periods of 2003 and 2007

Cited by 5 publications

References 12 publications

Review: Potential catastrophic reduction of sea ice in the western Arctic Ocean: Its impact on biogeochemical cycles and marine ecosystems

Review: Potential catastrophic reduction of sea ice in the western Arctic Ocean: Its impact on biogeochemical cycles and marine ecosystems

Biomass size spectra of mesozooplankton in the Chukchi Sea during the summers of 1991/1992 and 2007/2008: an analysis using optical plankton counter data

Interannual Variability of Salinity in the Chukchi Sea and Its Relationships with the Dynamics of the East Siberian Current during 1993–2020

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