文献类型：期刊文献

英文题名：Thermal fronts in coastal waters regulate phytoplankton blooms via acting as barriers: A case study from western Guangdong, China

作者：Zhou, Xin[1];Zhang, Shuwen[1];Liu, Sihai[2];Chen, Chunqing[2];Lao, Qibin[2];Chen, Fajin[2]

机构：[1]Shantou Univ, Inst Marine Sci, Guangdong Prov Key Lab Marine Disaster Predict & P, Shantou 515063, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China

年份：2024

卷号：636

外文期刊名：JOURNAL OF HYDROLOGY

收录：SCI-EXPANDED(收录号：WOS:001243566900001)、、EI(收录号：20242016104967)、Scopus(收录号：2-s2.0-85193204068)、WOS

基金：This work was supported by National Natural Science Foundation of China (92158201, 42376001, U1901213) , Entrepreneurship Project of Shantou (2021112176541391) , Scientific Research Start-Up Foundation of Shantou University (NTF20006) .

语种：英文

外文关键词：Oceanic front; Phytoplankton blooms; Pacific decadal oscillation; Western Guangdong

外文摘要：Oceanic fronts play an important role in regulating the distributions of phytoplankton and are subject to climate change. However, the relationship between climate change, oceanic fronts, and coastal phytoplankton blooms requires clarification. Using long-term satellite data, the seasonal, interannual, and decadal variations of the thermal fronts were examined, along with their effects on the distribution of phytoplankton in western Guangdong. Thermal fronts between the cold western Guangdong coastal current waters and the warm South China Sea (SCS) waters were found along the coast of western Guangdong during winter due to northeast winter monsoon. At decadal timescales, an increase (decrease) in frontal activities occurred during the negative (positive) Pacific Decadal Oscillation (PDO) phase. This pattern suggests that the positive (negative) PDO activity decreases (increases) sea level anomaly (SLA) and sea surface temperature in the SCS, thereby weakens (enhances) frontal activities along the coast. Accordingly, extensions and positive anomalies (> 1.5 mg/m(3)) in chlorophyll-a (Chl a) were observed during the positive PDO phase, whereas Chl a was concentrated in the nearshore areas during the negative PDO phase. These processes are primarily related to the barrier effects of enhanced thermal fronts and positive SLA on offshore materials transport during the negative PDO period. This study highlights the need to incorporate PDO activity into phytoplankton production in coastal oceans.