کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8966068 | 1646766 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spatial and temporal variability of the California Current identified from the synoptic monthly gridded World Ocean Database (WOD)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The synoptic monthly gridded (SMG) world ocean database (WOD) were constructed with 1°â¯Ãâ¯1° horizontal resolution and 28 standard vertical levels from the surface to 3000â¯m deep using the optimal spectral decomposition technique. Monthly acceleration potential (AP) relative to 1000-dbar is calculated for the isopycnal surface 26.4â¯kgâ¯mâ3 from January 1960 to December 2014 to investigate the spatial and temporal variability of the California Current. A composite analysis was conducted to obtain the total-time mean AP field and the climatological monthly mean AP variability, which is two orders of magnitude smaller than the total-time mean. Residual data were used to examine interannual variations of the AP field. An empirical orthogonal function (EOF) analysis was conducted to analyze the AP anomaly data. The EOF-1 (40% variance) represents strengthening/weakening of the North Pacific Gyre and California Current. EOF-2 (20% variance) represents onshore/offshore geostrophic flow. The first principal component was negatively correlated with the PDO; the second principal component was negatively correlated with both the PDO and ENSO, which implied that the AP anomaly contains climate variability signals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 151, May 2018, Pages 37-48
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 151, May 2018, Pages 37-48
نویسندگان
Peter C. Chu, Tetyana Margolina, DyAnna Rodriguez, Chenwu Fan, Leonid M. Ivanov,