Precise reconstruction of sea surface temperature for the last 10,000 years based on skeletal records of hermatypic corals.

对喜开岛和关岛的两性珊瑚的骨骼记录进行了深入的调查。他们得出了以下两个结论。我们从Kikai-jima的全新世阶地收集了雌雄同体的珊瑚化石，而不是Ruckus。珊瑚没有受到成岩作用的改变。珊瑚δ^<18>(δ^<18>)表明，纪开岛6.3 ~ 8.1 ka海表温度等于或略低于现在（25.4℃），3.1 ~ 6.3 ka和1.4 ~ 3.1 ka海表温度分别比现在低3℃和1℃。我们检查了关岛双礁（Double Reef）的213年珊瑚核（Porites lodata） GD2中的骨骼记录。1980 ~ 2000年δ^<18>O_<珊瑚>呈季节性波动，振幅较小，为0.23 ~ 0.57%_o （VPDB）。厄尔尼诺年（γ=-0.81）和非enso年（厄尔尼诺/南方涛动）（γ=-0.66）海温与δ^<18>O_<珊瑚>的统计关系强于拉尼娜年（γ=-0.48）。这些不同的统计关系反映了El Nino（<27℃）和la Nina（> ~ 21℃）期间关岛冬季海表温度和海水δ^<18>O （δ^<18>O_<sw>）的变化，反映了西太平洋暖池的迁移。在EI Nino期冬季，受WPWP东移影响，关岛被相对较低的海温和较高的海温水团包围，在GD2中记录为相对较大的季节海温振幅和正异常δ^<18>O_<sw>。而在拉尼娜期冬季，海温超过28℃，由于西向移动，水汽蒸发增加，降水减少，海温增大。这些变化导致拉尼娜期、厄尔尼诺期到厄尔尼诺期海温的季节变化和正δ^<18>O_<sw>异常的变化要小得多。

Intensive investigations have been conducted on skeletal records of hermatypic corals from Kikai-jima and Guam. They have led to the following two conclusions.1. We collected fossil hermatypic corals from the Holocene terraces on Kikai-jima, nor them Ruckus. The corals have net been diagenetically altered. Coral δ^<18>(δ^<18>) indicates that sea surface temperature (SST) were equal to or somewhat cooler than the present (25.4℃) during 6.3-8.1 ka in Kikai-jima and that it was lower than the present by 3℃ and 1℃ during 3.1-6.3 ka and 1.4-3.1 ka, respectivety.2. We have examined skeletal records in a 213-year coral core (Porites lodata), GD2, from Double Reef, Guam. δ^<18>O_<coral> shows seasonal fluctuations with small amplitudes of 0.23-0.57%_o (VPDB) for the years 1980-2000. A stronger statistical relationship exists between SST and δ^<18>O_<coral> for El Nino years (γ=-0.81) and non-ENSO years (El Nino/Southern Oscillation) (γ=-0.66) than for La Nina years (γ=-0.48). These different statistical relationships are a manifestation of changes in the winter season SST and changes in seawater δ^<18>O (δ^<18>O_<sw>) during El Nino (<27℃) versus la Nina periods (>21℃) at Guam, which reflects the migration of Western Pacific Warm Pool (WPWP). In the winter season of EI Nino periods, Guam Island is surrounded by a relatively low SST and high SSS water mass due to eastward migration of WPWP, which is recorded in GD2 as a relatively Large amplitude of seasonal SST and positive anomalies δ^<18>O_<sw>. In contrast, in the winter season of La Nina periods, SST exceeds 28℃ and SSS becomes greater by increases in evaporation and decreases in precipitation due to the westward migration of WPWP. These changes result in much smaller changes in seasonal SST foe La Nina periods El Nino periods to El Nino periods and in positive δ^<18>O_<sw> anomalies.