Effects of the interannual variability in chlorophyll concentrations on sea surface temperatures in the east tropical <scp>I</scp>ndian <scp>O</scp>cean

Ma, Jinfeng; Liu, Hailong; Lin, Pengfei; Zhan, Haigang

doi:10.1002/2015jc010862

Cited by 8 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…8). Consistent with former studies, the wind was intensified with a westward component when the IOD was positive and vice versa (Currie et al 2013), which was highly related to the zonal SST gradient in the Indian Ocean basin (Ma et al 2015). However, the warm SST in the eastern Indian Ocean during positive IOD intensified the westward wind (Liu et al 2022), which, in turn, enhanced coastal upwelling, leading to the introduction of cold water nearshore (Fig.…”

Section: Sstsupporting

confidence: 88%

Seasonal and Interannual Variability of Fronts and Their Impact on Chlorophyll-a in the Indonesian Seas

Zhang,

Yu,

Gao

et al. 2023

Journal of Physical Oceanography

View full text Add to dashboard Cite

The spatiotemporal variability of oceanic fronts in the Indonesian seas was investigated using high-resolution satellite observations. The study aimed to understand the underlying mechanism driving these fronts and their impact on chlorophyll-a variability. A high value of frontal probability was found near the coasts of major islands, exhibiting a distinct seasonal cycle with peaks occurrences during austral winter. The distribution variability of chlorophyll-a was generally consistent with the presence of active frontal zones, although a significantly positive relationship between fronts and chlorophyll-a was limited to only some specific areas, e.g., south Java Island and the Celebes Sea. Wind-driven upwelling played a major role in front generation in the Java upwelling region and enhanced frontal activity can promote the growth of phytoplankton, leading to higher chlorophyll-a. Furthermore, the study demonstrated that wind patterns preceded variations in front probability and chlorophyll-a by approximately two months. This lag suggests that the spatiotemporal variability of fronts and chlorophyll-a in this region is primarily influenced by the monsoon system. In addition, the sea surface temperature (SST) simultaneously modulated the chlorophyll-a variability. Negative SST anomalies were typically associated with positive anomalies in front probability the chlorophyll-a in most areas. Notably, the interannual variability of fronts and chlorophyll-a are prominent in the Java upwelling region. During El Niño years, this region experienced an enhanced monsoon, resulting in a negative SST anomaly alongside positive anomalies in front probability and chlorophyll-a. A comprehensive description and underlying dynamics of frontal activity in the Indonesian seas are provided by this study. The findings are helpful to delineate the variability in chlorophyll-a, thereby facilitating the future understanding of local primary production and the carbon cycle. Significance Statement As typical mesoscale processes, oceanic fronts have significant impacts on biological processes and fisheries in marginal seas. The complex spatiotemporal variability of fronts and their effects on biological processes in the Indonesian seas remain poorly understood. This study aimed to address this knowledge gap by investigating the seasonal and interannual variability of fronts and their influence on chlorophyll-a, a key indicator of phytoplankton biomass and primary productivity. The study identified a high frontal probability in south Java Island during austral winter and El Niño years. Wind-driven upwelling was found to be a major factor in front generation and promoting phytoplankton growth. The findings of this study will improve the theoretical knowledge of regional dynamics, local primary production, and the carbon cycle in the Indonesian seas, benefiting fisheries management and ecosystem conservation efforts.

show abstract

Section: Sstsupporting

confidence: 88%

Seasonal and Interannual Variability of Fronts and Their Impact on Chlorophyll-a in the Indonesian Seas

Zhang,

Yu,

Gao

et al. 2023

Journal of Physical Oceanography

View full text Add to dashboard Cite

show abstract

“…Java is located in the Eastern Indian Ocean where the southeast (SE) monsoon dominates during the austral winter [ 10 – 15 ]. This SE monsoon generates seasonal upwelling which produces cold water in the surface, creating a difference on SST and biological productivity between coastal and ocean-ward locations [ 13 , 16 – 20 ]. During the rest of the year, westerly winds linked to the west monsoon arise generating periods of weak and variable winds without upwelling productivity.…”

Section: Introductionmentioning

confidence: 99%

Influence of Coastal Upwelling on SST Trends along the South Coast of Java

et al. 2016

View full text Add to dashboard Cite

The south coast of Java has warmed at a much lower rate than adjacent ocean locations over the last three decades (1982–2015). This behavior can be observed during the upwelling season (July-October) and it is especially patent in August and September when upwelling attains the highest values. Although different warming rates (ocean-coast) had been previously observed in other areas around the world, this behavior was always linked to situations where upwelling increased or remained unchanged. South Java warming is observed at ocean locations and cooling near shore but under a scenario of decreasing upwelling (~30% in some cases). The origin of coastal cooling is due to changes in the vertical structure of the water column. A vein of subsurface water, which has cooled at a rate higher than 0.3°C per decade, is observed to enter from the northwestern part of the study area following the South Java Current. This water only manifests at surface near coast, where it is pumped up by coastal upwelling.

show abstract

“…During a pIOD event, anomalous upwelling processes can influence the thermocline, SST and Chla concentration variations in the eastern EIO and southeastern BoB (Chen et al., 2016; Ma et al., 2015; Vinayachandran et al., 2007; Xu et al., 2021). Figure 9 shows the anomalies of Chla, SST, OLR, surface wind, and SSH during the extreme IOD event in 2019.…”

Section: Resultsmentioning

confidence: 99%

A Large Winter Chlorophyll‐a Bloom in the Southeastern Bay of Bengal Associated With the Extreme Indian Ocean Dipole Event in 2019

Huang

et al. 2023

JGR Oceans

View full text Add to dashboard Cite

show abstract

Effects of the interannual variability in chlorophyll concentrations on sea surface temperatures in the east tropical Indian Ocean

Cited by 8 publications

References 41 publications

Seasonal and Interannual Variability of Fronts and Their Impact on Chlorophyll-a in the Indonesian Seas

Seasonal and Interannual Variability of Fronts and Their Impact on Chlorophyll-a in the Indonesian Seas

Influence of Coastal Upwelling on SST Trends along the South Coast of Java

A Large Winter Chlorophyll‐a Bloom in the Southeastern Bay of Bengal Associated With the Extreme Indian Ocean Dipole Event in 2019

Contact Info

Product

Resources

About