Variability SST Frontal Activity in Eastern Pacific Ocean and its impact on Fishery Catch and Marine Ecosystems
Abstract
Distribution of sea surface temperature (SST) fronts are derived from high-resolution MODIS dataset in Eastern Pacific Ocean from 2003 to 2016. And its impact on fishery catch and influence on marine ecosystem was subsequently investigated. Monthly frontal probability is calculated to describe corresponding spatial distribution and temporal variability. Frontal probability is generally higher along the coast and decreasing offshore. The frontal activity could extend few hundreds of kilometers near the major capes and central Pacific Ocean. Corresponding results from empirical orthogonal functions (EOF) shows large variability of SST front is found in mid-latitude and central Pacific Ocean. The temporal variability captures a strong interannual and annual variability in those regions, while intraannual variability are found more prominent at small scale near major capes and islands. The frontal variability is highly impacted by wind stress, upwelling, air-sea interaction, current, topography, eddy activity, El Nino along with other factors. The dataset for fishery catch and chlorophyll observations are investigated in this study under the influence of front. The results show strong correlation between front and fishing activity and between front and chlorophyll for coastal region. More fish was caught off the coast of Peru when SST front was anomalously higher, while the El Nino events negatively impact the fishing activities.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMOS23F1679W
- Keywords:
-
- 3364 Synoptic-scale meteorology;
- ATMOSPHERIC PROCESSESDE: 4215 Climate and interannual variability;
- OCEANOGRAPHY: GENERALDE: 4263 Ocean predictability and prediction;
- OCEANOGRAPHY: GENERALDE: 4504 Air/sea interactions;
- OCEANOGRAPHY: PHYSICAL