Decadal and seasonal changes in temperature, salinity, nitrate, and chlorophyll in inshore and offshore waters along southeast Australia

摘要: Sixty years of oceanographic in situ data at Port Hacking (34°S) and Maria Island (42°S) 15 satellite-derived chlorophyll a (chl a) inshore offshore waters southeast Australia show changes the seasonality trend water properties consistent with long-term intensification southerly extensions East Australian Current (EAC) water. Decadal analyses reveal that EAC extension increased gradually from 1940s to 1980s, followed by rapid increase since 1990s. This acceleration coincided enhanced winter nitrate, implying injections subantarctic Island. Satellite-derived chl six coastal sites companion western Tasman Sea showed significant inshore-offshore variations seasonal cycle trend. After 2004–2005, became increasingly similar those Bass Strait St. Helens, suggesting was extending further southward. Comparative presence declined offshore. Seasonal cycles recent shift away traditional spring bloom, toward biomass, primary productivity warm, energetic more frequent cooler, fresher nitrate-replete waters. Overall, we find complex temporal, latitudinal, multiple masses, particularly Island, will profoundly impact fisheries ecosystems.