Trends of sea surface temperature and sea surface temperature fronts in the South China Sea during 2003–2017

Yu, Yi; Zhang, Haoran; Jin, Jiangbo; Wang, Yuntao

doi:10.1007/s13131-019-1416-4

Cited by 41 publications

(21 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As these residuals are not much larger than the calibration error, it may be inferred that the TEX 86 proxy on the northern SCS shelf reflects SSTs during the coldest season. Similar conclusions have been drawn in several previous studies of TEX 86 in the northern SCS (Ge et al, 2013;Zhang et al, 2012;Zhou et al, 2014). Support for this inference comes from a recent observation of iGDGTs abundance in surface waters of the SCS shelf, which in winter were 3 times higher than in summer (Jia et al, 2017).…”

Section: Seasonality Of Tex H 86 Indexsupporting

confidence: 88%

See 1 more Smart Citation

Comparison of the U37K′, LDI, TEX86H, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

et al. 2020

View full text Add to dashboard Cite

Abstract. The temperature proxies U37K′, LDI, TEX86H, and RI-OH are derived from lipid biomarkers, namely long-chain alkenones from coccolithophorids and long-chain diols ascribed tentatively to eustigmatophytes, as well as glycerol dialkyl glycerol tetraethers (GDGTs) and OH-GDGTs produced by Archaea. The applicability of these proxies in the South China Sea (SCS) has been investigated previously. However, in each study only one or two of the proxies were compared, and the recently updated calibrations or new calibrating methods such as BAYSPAR and BAYSPLINE were not applied. Here, we investigate four proxies in parallel in a set of surface sediment samples from the northern SCS shelf and relate them to local sea surface temperature (SST), which allows for us to compare and assess similarities and differences between them and also help improve regional multiproxy seawater temperature reconstructions. Our results indicate that U37K′ reflects annual mean SST with a slight bias toward the warm season. Terrestrial inputs appear to have a significant impact on LDI, TEX86H, and RI-OH proxies near the coast, leading to colder LDI- and TEX86H-derived temperatures but a warmer RI-OH temperature estimate. After excluding samples influenced by terrestrial materials, we find that LDI-derived temperature agrees well with annual SST, while TEX86H- and RI-OH-derived temperature estimates are close to SSTs in seasons dominated by the East Asian winter monsoon and summer monsoon, respectively. The different seasonal biases of these temperature proxies provide valuable tools to reconstruct regional SSTs under different monsoonal conditions.

show abstract

Section: Seasonality Of Tex H 86 Indexsupporting

confidence: 88%

“…The highest BIT value (0.49) observed in the PRE (sample PRE-A8; Fig. 5g) is similar to data reported by Zhang et al (2012). As the BIT index in soils generally tends to be > 0.9 (Hopmans et al, 2004), the highest BIT value at the site likely indicates a significant input of soil-derived GDGTs.…”

Section: Sources Of Igdgts In the Surface Sedimentssupporting

confidence: 81%

Comparison of the U37K′, LDI, TEX86H, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In the Bolinao-Anda Reef Complex in northwestern Philippines facing the South China Sea, H. coerulea coral cover has increased from just 1% in the 1990s to about 50% after 20 years (Atrigenio, 1995; Vergara, 2009), during which time two mass bleaching events were reported (Arceo et al, 2001; Shaish et al, 2010). The increasing prevalence of H. coerulea coincides with rising sea surface temperature in the South China Sea region, which was estimated at 0.50 ± 0.26 °C per decade from 1993–2003 (Fang et al, 2006) and 0.31 °C per decade from 2003–2017 (Yu et al, 2019) based on high-resolution satellite data. The ability of H. coerulea to compete for space on the reef may be attributed to various factors, chief among which could be resistance to environmental stressors affecting the area, which include temperature variability (Penaflor et al, 2009), reduced salinity (Cardenas et al, 2010), and eutrophication (Ferrera et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Warm seawater temperature promotes substrate colonization by the blue coral, Heliopora coerulea

Guzman

Atrigenio

Shinzato

et al. 2019

PeerJ

View full text Add to dashboard Cite

Background Heliopora coerulea, the blue coral, is a reef building octocoral that is reported to have a higher optimum temperature for growth compared to most scleractinian corals. This octocoral has been observed to grow over both live and dead scleractinians and to dominate certain reefs in the Indo-Pacific region. The molecular mechanisms underlying the ability of H. coerulea to tolerate warmer seawater temperatures and to effectively compete for space on the substrate remain to be elucidated. Methods In this study, we subjected H. coerulea colonies to various temperatures for up to 3 weeks. The growth and photosynthetic efficiency rates of the coral colonies were measured. We then conducted pairwise comparisons of gene expression among the different coral tissue regions to identify genes and pathways that are expressed under different temperature conditions. Results A horizontal growth rate of 1.13 ± 0.25 mm per week was observed for corals subjected to 28 or 31 °C. This growth rate was significantly higher compared to corals exposed at 26 °C. This new growth was characterized by the extension of whitish tissue at the edges of the colony and was enriched for a matrix metallopeptidase, a calcium and integrin binding protein, and other transcripts with unknown function. Tissues at the growth margin and the adjacent calcified encrusting region were enriched for transcripts related to proline and riboflavin metabolism, nitrogen utilization, and organic cation transport. The calcified digitate regions, on the other hand, were enriched for transcripts encoding proteins involved in cell-matrix adhesion, translation, receptor-mediated endocytosis, photosynthesis, and ion transport. Functions related to lipid biosynthesis, extracellular matrix formation, cell migration, and oxidation-reduction processes were enriched at the growth margin in corals subjected for 3 weeks to 28 or 31 °C relative to corals at 26 °C. In the digitate region of the coral, transcripts encoding proteins that protect against oxidative stress, modify cell membrane composition, and mediate intercellular signaling pathways were enriched after just 24 h of exposure to 31 °C compared to corals at 28 °C. The overall downregulation of gene expression observed after 3 weeks of sustained exposure to 31 °C is likely compensated by symbiont metabolism. Discussion These findings reveal that the different regions of H. coerulea have variable gene expression profiles and responses to temperature variation. Under warmer conditions, the blue coral invests cellular resources toward extracellular matrix formation and cellular migration at the colony margins, which may promote rapid tissue growth and extension. This mechanism enables the coral to colonize adjacent reef substrates and successfully overgrow slower growing scleractinian corals that may already be more vulnerable to warming ocean waters.

show abstract

“…There are various fronts in the northern South China Sea (NSCS), under the influence of complex topography, tides, the East Asian monsoon (strong northeasterly winter winds and weak southwesterly summer winds), Kuroshio intrusion, freshwater outflow, and coastal currents [8,17,18,[21][22][23][24][25]. The frontal position and intensity in the NSCS at monthly to interannual time scales were well documented from remotely sensed data since 1980s.…”

Section: Introductionmentioning

confidence: 97%

Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations

Xie

Zhao

et al. 2021

Water

View full text Add to dashboard Cite

the spatial pattern of the wintertime Pearl River plume front (PRPF), and its variability on diurnal and spring-neap time scales are characterized from the geostationary meteorological Himawari-8 satellite, taking advantage of the satellite’s unique 10-minutely sea surface temperature sequential images. Our findings suggest that the PRPF in winter consists of three subfronts: the northern one north of 22°N 20′, the southern one south of 21°N 40′, and the middle one between 22°N 20′ and 21°N 40′. The time-varying trend of the frontal intensity generally exhibits a strong-weak-strong pattern, with the weakest plume front occurring at about 06:00 UTC, which is closely associated with net surface heat flux over the region. The comparison in frontal variability between the spring and neap tides shows that the plume front during the spring tide generally tends to be more diffuse for the frontal probability, move further offshore for the frontal position, and be weaker for the frontal intensity than those found during the neap tide. These great differences largely depend on the tidally induced stronger turbulent mixing during the spring tide while the wind stress only plays a secondary role in the process. To best of our knowledge, the distinct diurnal variations in PRPF with wide coverage are observed for the first time. This study demonstrates that the Himawari-8 geostationary satellite has great potential in characterizing high-frequency surface thermal fronts in considerable detail.

show abstract

Trends of sea surface temperature and sea surface temperature fronts in the South China Sea during 2003–2017

Cited by 41 publications

References 31 publications

Comparison of the U<sub>37</sub><sup>K<sup>′</sup></sup>, LDI, TEX<sub>86</sub><sup>H</sup>, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

Comparison of the U<sub>37</sub><sup>K<sup>′</sup></sup>, LDI, TEX<sub>86</sub><sup>H</sup>, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

Warm seawater temperature promotes substrate colonization by the blue coral, Heliopora coerulea

Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations

Contact Info

Product

Resources

About

Trends of sea surface temperature and sea surface temperature fronts in the South China Sea during 2003–2017

Cited by 41 publications

References 31 publications

Comparison of the U&lt;sub&gt;37&lt;/sub&gt;&lt;sup&gt;K&lt;sup&gt;′&lt;/sup&gt;&lt;/sup&gt;, LDI, TEX&lt;sub&gt;86&lt;/sub&gt;&lt;sup&gt;H&lt;/sup&gt;, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

Comparison of the U&lt;sub&gt;37&lt;/sub&gt;&lt;sup&gt;K&lt;sup&gt;′&lt;/sup&gt;&lt;/sup&gt;, LDI, TEX&lt;sub&gt;86&lt;/sub&gt;&lt;sup&gt;H&lt;/sup&gt;, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

Warm seawater temperature promotes substrate colonization by the blue coral, Heliopora coerulea

Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations

Contact Info

Product

Resources

About

Comparison of the U<sub>37</sub><sup>K<sup>′</sup></sup>, LDI, TEX<sub>86</sub><sup>H</sup>, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea

Comparison of the U<sub>37</sub><sup>K<sup>′</sup></sup>, LDI, TEX<sub>86</sub><sup>H</sup>, and RI-OH temperature proxies in sediments from the northern shelf of the South China Sea