scholarly journals Interannual variability of temperature inversions in the subarctic North Pacific

2006 ◽  
Vol 33 (24) ◽  
Author(s):  
Shuhei Masuda ◽  
Toshiyuki Awaji ◽  
Nozomi Sugiura ◽  
Takahiro Toyoda ◽  
Yoichi Ishikawa ◽  
...  
Keyword(s):  
Interannual Variability ◽  
North Pacific ◽  
Subarctic North Pacific ◽  
Temperature Inversions

scholarly journals Temperature Inversions in the Subarctic North Pacific

2005 ◽  
Vol 35 (12) ◽  
pp. 2444-2456 ◽  
Author(s):  
Hiromichi Ueno ◽  
Ichiro Yasuda
Keyword(s):  
North Pacific ◽  
North Pacific Ocean ◽  
World Ocean ◽  
Gulf Of Alaska ◽  
Tidal Mixing ◽  
Large Temperature ◽  
Hydrographic Data ◽  
Subarctic North Pacific ◽  
The World ◽  
Temperature Inversions

Abstract Hydrographic data from the World Ocean Database 2001 and Argo profiling floats were analyzed to study temperature inversions in the subarctic North Pacific Ocean. The frequency distribution of temperature inversions [F(t-inv)] at a resolution of 1° (latitude) × 3° (longitude) was calculated. Temperature inversions seldom occurred around 50°N in the eastern subarctic North Pacific but were more common in the northern Gulf of Alaska and the southeastern subarctic North Pacific (42°–48°N, 140°–170°W). Large temperature inversions occurred throughout the year in the western and central subarctic North Pacific (north of 42°N and west of 180°) except near the Aleutian and Kuril Islands. Near those islands, F(t-inv) was characterized by pronounced seasonal variations forced by surface heating/cooling and strong tidal mixing.

scholarly journals Formation and variation of temperature inversions in the eastern subarctic North Pacific

2007 ◽  
Vol 34 (5) ◽  
Author(s):  
Hiromichi Ueno ◽  
Eitarou Oka ◽  
Toshio Suga ◽  
Hiroji Onishi ◽  
Dean Roemmich
Keyword(s):  
North Pacific ◽  
Subarctic North Pacific ◽  
Temperature Inversions

Microzooplankton grazing constrains pathways of carbon export in the subarctic North Pacific

2021 ◽  
Author(s):  
Heather M. McNair ◽  
Françoise Morison ◽  
Jason R. Graff ◽  
Tatiana A. Rynearson ◽  
Susanne Menden‐Deuer
Keyword(s):  
North Pacific ◽  
Carbon Export ◽  
Subarctic North Pacific ◽  
Microzooplankton Grazing

scholarly journals Coralline alga reveals first marine record of subarctic North Pacific climate change

2007 ◽  
Vol 34 (7) ◽  
Author(s):  
Jochen Halfar ◽  
Robert Steneck ◽  
Bernd Schöne ◽  
G. W. K. Moore ◽  
Michael Joachimski ◽  
...  
Keyword(s):  
Climate Change ◽  
North Pacific ◽  
Coralline Alga ◽  
Subarctic North Pacific

Analysis of the interannual variability in satellite gravity solutions : impact of climate modes on water mass displacements across continents and oceans

2021 ◽  
Author(s):  
Julia Pfeffer ◽  
Anny Cazenave ◽  
Anne Barnoud
Keyword(s):  
Climate Variability ◽  
Mass Transport ◽  
Interannual Variability ◽  
North Atlantic ◽  
North Pacific ◽  
Water Mass ◽  
Water Cycle ◽  
Satellite Gravity ◽  
Climate Modes ◽  
Shallow Seas

<p>The acquisition of time-lapse satellite gravity measurements during the GRACE and GRACE Follow On (FO) missions revolutionized our understanding of the Earth system, through the accurate quantification of the mass transport at global and regional scales. Largely related to the water cycle, along with some geophysical signals, decadal trends and seasonal cycles dominate the mass transport signals, constituting about 80 % of the total variability measured during GRACE (FO) missions. We focus here on the interannual variability, constituting the remaining 20 % of the signal, once linear trends and seasonal signals have been removed. Empirical orthogonal functions (EOFs) highlight the most prominent signals, including short-lived signals triggered by major earthquakes, interannual oscillations in the water cycle driven by the El Nino Southern Oscillation (ENSO) and significant decadal variability, potentially related to the Pacific Decadal Oscillation (PDO). The interpretation of such signals remains however limited due to the arbitrary nature of the statistical decomposition in eigen values. To overcome these limitations, we performed a LASSO (Least Absolute Shrinkage and Selection Operator) regression of eight climate indices, including ENSO, PDO, NPGO (North Pacific Gyre Oscillation), NAO (North Atlantic Oscillation), AO (Arctic Oscillation), AMO (Atlantic Multidecadal Oscillation), SAM (Southern Annular Mode) and IOD (Indian Ocean Dipole). The LASSO regularization, coupled with a cross-validation, proves to be remarkably successful in the automatic selection of relevant predictors of the climate variability for any geographical location in the world. As expected, ENSO and PDO impact the global water cycle both on land and in the ocean. The NPGO is also a major actor of the global climate, showing similarities with the PDO in the North Pacific. AO is generally favored over NAO, especially in the Mediteranean Sea and North Atlantic. SAM has a preponderant influence on the interannual variability of ocean bottom pressures in the Southern Ocean, and, in association with ENSO, modulates the interannual variability of ice mass loss in West Antarctica. AMO has a strong influence on the interannual water cycle along the Amazon river, due to the exchange of moisture in tropical regions. IOD has little to no impact on the interannual water cycle. All together, climate modes generate changes in the water mass distribution of about 100 mm for land, 50 mm for shallow seas and 15 mm for oceans. Climate modes account for a secondary but significant portion of the total interannual variability (at maximum 60% for shallow seas, 50 % for land and 40% for oceans). While such processes are insufficient to fully explain the complex nature of the interannual variability of water mass transport on a global scale, climate modes can be used to correct the GRACE (FO) measurements for a significant part of the natural climate variability and uncover smaller signals masked by such water mass transports.</p>

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