Arctic Ocean Simulations in the CMIP6 Ocean Model Intercomparison Project (OMIP) DOI Creative Commons
Qi Shu, Qiang Wang, Chuncheng Guo

et al.

Published: Oct. 27, 2022

Abstract. Arctic Ocean simulations in 19 global ocean-sea ice models participating the Model Intercomparison Project (OMIP) of CMIP6 are evaluated this paper. Our results indicate that no significant improvements were achieved from previous Coordinated Ocean-ice Reference Experiments phase II (CORE-II) to current OMIP. Large model biases and inter-model spread exist simulated mean state halocline Atlantic Water layer OMIP models. Most suffer too thick deep layer, base, large fresh halocline. The largely agree on inter-annual decadal variability freshwater content volume/heat/freshwater transports through gateways. can reproduce observed changes volume, heat gateways except for Bering Strait. Overall, performance is similar between CORE2-forced OMIP-1 JRA55-do-forced OMIP-2.

Language: Английский

Recent emergence of Arctic atlantification dominated by climate warming DOI Creative Commons
Qiang Wang, Qi Shu, Fan Wang

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(48)

Published: Nov. 27, 2024

The Arctic Ocean’s Eurasian Basin underwent notable atlantification during the 2010s, characterized by warming of Atlantic Water layer and increased upper ocean salinity. Despite profound implications for climate system marine ecosystems, primary drivers this process remain debated. One hypothesis suggested that alternating phases atmospheric Dipole may have mitigated recent atlantification. Here, we use high-resolution model simulations to disentangle main contributors in basin. We show decline sea ice was dominant driver, while wind variability associated with played a minor role, contributing slightly rather than mitigating process. positive phase Oscillation also made relatively small contribution. Although changes circulation over Greenland Sea tended reduce warm water inflow through Fram Strait, cooling effect on outweighed induced decline.

Language: Английский

Citations

0
Modification of Pacific water in the northern Canadian Arctic DOI Creative Commons
Igor Dmitrenko, Sergei Kirillov,

Bert Rudels

et al.

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: June 12, 2023

The oceanography of the northern Canadian Arctic Archipelago (CAA) remains poorly studied. Here we present a unique set conductivity–temperature–depth (CTD) and nitrate profiles collected in fjord system around Axel Heiberg Island CAA during April–May 2022. are examined within context upstream observations Ocean downstream central CAA, reveal origin water masses their interactions with ambient from continental slope nearby tidewater glacier outlet. subsurface (~25–180 m depth) is associated Pacific outflow Ocean. underlying halocline separates deeper layer polar that has interacted warm (>0°C) Atlantic observed below 240 depth. significantly modified compared to adjoining Ocean, as evidenced by following details. Cold intrusions create deviations ~0.25°C temperature profile through down depth 140 m. Profiles show no thermal signature summer water. Compared adjacent fraction Pacific-derived Atlantic-modified warmer, while colder. Overall, our results suggest this area due enhanced vertical mixing narrow band over shelf off further outlet glaciers area. This implies tracing initial thermohaline flow seems be hardly possible without use additional tracers. We also find evidence geothermal heating near seafloor, which not surprising given presence terrestrial vents Island, speculate heat flux limits ice growth terminus.

Language: Английский

Citations

1
Comparison of Freshwater Content and Variability in the Arctic Ocean Using Observations and Model Simulations DOI Creative Commons
Emma L. Hoffman, Bulusu Subrahmanyam, Corinne B. Trott

et al.

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(15), P. 3715 - 3715

Published: July 25, 2023

Freshwater content (FWC), generally characterized in the Arctic Ocean by salinities lower than 34.8 psu, has shifted both quantity and distribution recent decades Ocean. This been largely driven changes volume salinity of freshwater sources direction magnitude major currents. In this study, we analyze variability FWC other physical oceanographic variables from 1993 to 2021 Beaufort Gyre (BG) using situ remote sensing observations five ocean models reanalysis products. Generally, products underestimate BG when compared with observations. Modeled sea surface height (SSH) are well correlated during time period similar correlations observational data these variables. ORAS5 compares best EN4 over entire study period, although GLORYS12 agrees pre-2007 SODA post-2007. Outside BG, consistency between modeled SSH, FWC, limited varies models. These comparisons help identify discrepancies model while highlighting areas where future improvements necessary further our understanding FWC. As scarce Arctic, their accuracy important studying dynamic vulnerable ocean.

Language: Английский

Citations

1
Patterns of summer ichthyoplankton distribution, including invasive species, in the Bering and Chukchi Seas DOI Creative Commons

Sung Hoon Kim,

Wuju Son,

Jaeill Yoo

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: April 22, 2024

A multidisciplinary survey was carried out in the Pacific Arctic and sub-Arctic regions of North Ocean on Korean icebreaking research vessel Araon . During this survey, ichthyoplankton fishes region ranged from Bering Sea to northern Chukchi Shelf summer. The most dominant species Gadus chalcogrammus , followed by Pleuronectes quadrituberculatus Boreogadus saida P. were particularly abundant near Strait, whereas B. Sea. Hierarchical cluster analysis revealed four distinct communities based geographical regions. However, Eleginus gracilis which previously known be seen between latitudes 66.5°N 69.5°N, found above 70°N, suggesting that its distribution extends further north. Furthermore, we noticed Benthosema glaciale is usually Atlantic sector Ocean, observed In addition these unusual distributions, several are mainly coastal areas region. influx various uncommon fish into can attributed multiple factors, including freshwater inflow East Siberian intrusion warm waters, strongly affected global warming. Consequently, it imperative conduct rigorous monitoring region, with a particular focus Sea, better understand implications

Language: Английский

Citations

0
Arctic Ocean Simulations in the CMIP6 Ocean Model Intercomparison Project (OMIP) DOI Creative Commons
Qi Shu, Qiang Wang, Chuncheng Guo

et al.

Published: Oct. 27, 2022

Abstract. Arctic Ocean simulations in 19 global ocean-sea ice models participating the Model Intercomparison Project (OMIP) of CMIP6 are evaluated this paper. Our results indicate that no significant improvements were achieved from previous Coordinated Ocean-ice Reference Experiments phase II (CORE-II) to current OMIP. Large model biases and inter-model spread exist simulated mean state halocline Atlantic Water layer OMIP models. Most suffer too thick deep layer, base, large fresh halocline. The largely agree on inter-annual decadal variability freshwater content volume/heat/freshwater transports through gateways. can reproduce observed changes volume, heat gateways except for Bering Strait. Overall, performance is similar between CORE2-forced OMIP-1 JRA55-do-forced OMIP-2.

Language: Английский

Citations

1