Decadal variations in trace metal concentrations on a coral reef: Evidence from a 159 year record of Mn, Cu, and V in a <i>Porites</i> coral from the northern <scp>S</scp>outh <scp>C</scp>hina <scp>S</scp>ea

Chen, Xuefei; Wei, Gangjian; Deng, Wenfeng; Liu, Ying; Sun, Yali; Zeng, Tao; Xie, Luhua

doi:10.1002/2014jc010390

Cited by 30 publications

(23 citation statements)

References 81 publications

(137 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[] again indicate that the seawater nutrients on the coral reefs in this region are significantly enriched when the Qiongdong upwelling is activated. Thus, the Qiongdong upwelling may be very important for supplying nutrients to this region [ Chen et al ., a].…”

Section: Discussionmentioning

confidence: 99%

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ¹¹B records

et al. 2015

Self Cite

View full text Add to dashboard Cite

Long‐term seawater pH records are essential for evaluating the rates of ocean acidification (OA) driven by anthropogenic emissions. Widespread, natural decadal variability in seawater pH superimposes on the long‐term anthropogenic variations, likely influencing the OA rates estimated from the pH records. Here, we report a record of annual seawater pH estimated using the δ11B proxy over the past 159 years reconstructed from a Porites coral collected to the east of Hainan Island in the northern South China Sea (SCS). By coupling this time series with previously reported long‐term seawater pH records in the West Pacific, the decadal variability in seawater pH records and its possible driving mechanisms were investigated. The results indicate that large decadal variability in seawater pH has occurred off eastern Hainan Island over the past 159 years, in agreement with previous records. The Qiongdong upwelling system, which controls nutrient supplies, regulates surface water productivity, and is driven by the East Asian summer monsoon, is the primary control of this decadal variability, while terrestrial inputs appear not influence significantly. Meanwhile the impacts of the Pacific Decadal Oscillation (PDO) and the El Nino and Southern Oscillation (ENSO) systems on seawater pH off eastern Hainan Island is likely limited. In contrast, the PDO is the main factor to influence the decadal seawater pH variability offshore the East Australia, while the mechanism controlling the decadal seawater pH variability in Guam is not clear yet. Meanwhile, The rate of decrease in seawater pH estimated from coral records are significantly different in different regions and over different time spans, which may reflect a combination of natural decadal variability in seawater pH and long‐term variations. Therefore, understanding the mechanisms driving natural variability in seawater pH is important for improving estimates of ocean acidification rates driven by anthropogenic emissions.

show abstract

Section: Discussionmentioning

confidence: 99%

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ¹¹B records

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The sampling locations are shown in Figure 1. The modern coral 11LW4 was used previously to study decadal variability in the northern SCS [Deng et al, 2013;Chen et al, 2015;Wei et al, 2015].…”

Section: Methodsmentioning

confidence: 99%

“…Then, X-ray photographs were taken to reveal the regular and well-defined annual density bands, which were used to establish the coral chronology. The X-radiographs of the coral 11LW4 refer to Chen et al [2015], and those of other corals are presented in supporting information Figure S1. Next, the coral slices were soaked in 10% H 2 O 2 for 24 h to remove organic matter, and this was followed by ultrasonic cleaning in deionized water for 30 min to remove surface contaminates.…”

Section: Methodsmentioning

confidence: 99%

A comparison of the climates of the Medieval Climate Anomaly, Little Ice Age, and Current Warm Period reconstructed using coral records from the northern South China Sea

Deng

Chen

et al. 2017

JGR Oceans

Self Cite

View full text Add to dashboard Cite

For the global oceans, the characteristics of high‐resolution climate changes during the last millennium remain uncertain because of the limited availability of proxy data. This study reconstructs climate conditions using annually resolved coral records from the South China Sea (SCS) to provide new insights into climate change over the last millennium. The results indicate that the climate of the Medieval Climate Anomaly (MCA, AD 900–1300) was similar to that of the Current Warm Period (CWP, AD 1850‐present), which contradicts previous studies. The similar warmth levels for the MCA and CWP have also been recorded in the Makassar Strait of Indonesia, which suggests that the MCA was not warmer than the CWP in the western Pacific and that this may not have been a globally uniform change. Hydrological conditions were drier/saltier during the MCA and similar to those of the CWP. The drier/saltier MCA and CWP in the western Pacific may be associated with the reduced precipitation caused by variations in the Pacific Walker Circulation. As for the Little Ice Age (LIA, AD 1550–1850), the results from this study, together with previous data from the Makassar Strait, indicate a cold and wet period compared with the CWP and the MCA in the western Pacific. The cold LIA period agrees with the timing of the Maunder sunspot minimum and is therefore associated with low solar activity. The fresher/wetter LIA in the western Pacific may have been caused by the synchronized retreat of both the East Asian Summer Monsoon and the Australian Monsoon.

show abstract

“…Besides, Kim (2011, 2014) showed that SGD was a major source of REE in local coastal waters. Given the lack of covariance between the REE/Ca and Mn/Ca ratios (Chen et al, 2015;Fallon et al, 2002;Lewis et al, 2007) (Table 1), as well as the absence of large surface runoff from rivers and volcanic eruptions near the study area, SGD may be the primary controlling factor for REE variability in the coral records.…”

Section: Control Of Ree and Ba In Coastal Seawatersmentioning

confidence: 99%

Coral geochemical record of submarine groundwater discharge back to 1870 in the northern South China Sea

Jiang

Song

et al. 2018

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

The importance of submarine groundwater discharge (SGD) is becoming increasingly recognized because of its potential significance as a source of dissolved species. To explore the probable coral geochemical signal of SGD and verify the validity of potential reliable proxies, multiple geochemical proxies over the last 137 years were identified from a Porites coral near a subterranean estuary in the northern South China Sea, where the SGD was reported to be the predominant flux of terrestrial waters to the coastal ocean. Results indicated that the SGD in the coastal zone was the dominant source of trace elements, especially REE and Ba, due to the various dissolution reactions occurring during groundwater flow in the karst terrain.The time-and frequency-domain comparison between the coral geochemical proxy and the local/regional precipitation indicated that coral REE/Ca ratios are predominantly impacted by the SGD associated with local precipitation, while coral Ba/Ca ratios are also affected by the primary productivity and allochthonous seawater Ba from surrounding areas. The REE signal from coral allows us to reconstruct the coastal surface seawater REE concentrations and the SGD rates on the coast of Sanya during 1870-2006. In a novel approach to developing a proxy for historic SGD to coastal waters, this study provides evidence that the coral REE/Ca record from the karst coast with large SGD has potentials to be a promising paleohydrological indicator.

show abstract

Decadal variations in trace metal concentrations on a coral reef: Evidence from a 159 year record of Mn, Cu, and V in a Porites coral from the northern South China Sea

Cited by 30 publications

References 81 publications

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ¹¹B records

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ¹¹B records

A comparison of the climates of the Medieval Climate Anomaly, Little Ice Age, and Current Warm Period reconstructed using coral records from the northern South China Sea

Coral geochemical record of submarine groundwater discharge back to 1870 in the northern South China Sea

Contact Info

Product

Resources

About

Decadal variations in trace metal concentrations on a coral reef: Evidence from a 159 year record of Mn, Cu, and V in a Porites coral from the northern South China Sea

Cited by 30 publications

References 81 publications

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ11B records

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ11B records

A comparison of the climates of the Medieval Climate Anomaly, Little Ice Age, and Current Warm Period reconstructed using coral records from the northern South China Sea

Coral geochemical record of submarine groundwater discharge back to 1870 in the northern South China Sea

Contact Info

Product

Resources

About

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ¹¹B records

Decadal variability in seawater pH in the West Pacific: Evidence from coral δ¹¹B records