Reconstruction of the climatic changes from borehole temperature and tree rings in the Kamchatka Peninsula

从钻孔温度和树木年轮重建堪察加半岛的气候变化

• 批准号: 12573015
• 负责人: NAGAO Toshiyasu
• 金额: $ 9.54万
• 依托单位: TOKAI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12573015/
• 关键词: Kamchatka Peninsula; paleoclimate reconstruction; geothermics; borehole temperature; groundwater flow; stable isotopes; dendrochronology; global warming; 気候変動; 地下温度; 年輪年代学; 極東地域; 古気候; 地下温度勾配; カムチャッカ

We estimated climate changes in the Kamchatka Peninsula over the last few centuries with two independent, geothermal and dendrochronological methods.As studies with the geothermal method, we conducted three expeditions in 2000 to 2002 to make repeated measurements of temperature profiles in ten boreholes around 53 degN. The ground surface temperature history could be reconstructed from the temperature profiles in six of the boreholes, demonstrating a significant temperature increase of 1 to 2 K for the last 50 to 100 years. We also made long-tem temperature monitoring at some specific depths in three boreholes and observed temporal variations which suggest the existence of small-scale water convections and seasonal changes in groundwater flow. Groundwater samples were taken from the boreholes where temperature logging was made and surface water samples were also collected from rivers. Geochemical and stable isotope characteristics of the groundwater and surface water were analyzed to e … More valuate the effects of the groundwater flow on the subsurface temperature and climate reconstruction in the study areas.A 422-year long chronology of ring-width indices representing central Kamchatka was established from tree-ring cores sampled from Larix gmerinii growing natural in the Kronotsky National Park in 2001 based on reconnaissance in 2000. Response analysis of the chronology against observed climate revealed a significant correlation with early-summer temperature. The reconstructed temperature extending back to A.D. 1624 based on the dendrochronology and its response to climate, revealed a general warming trend over the last 130 years and a cyclic oscillation of decadal period. The long-term trend is consistent with the result from the borehole temperature profiles.Reconstruction of the ground surface temperature history from borehole temperature profiles was also made for three wells in Korea and one well on the coast of Lake Biwa. In Korea, the estimated temperature changes are consistent with the air temperature data at nearby meteorological stations. The surface temperature history by Lake Biwa appears to reflect local environmental changes for the last 5000 years. Less

2000年至2002年，我们在堪察加半岛进行了三次考察，在北纬53度附近的10个钻孔进行了温度剖面的重复测量，用地热和树木年代学两种独立的方法估算了堪察加半岛近几个世纪的气候变化。地表温度的历史可以重建的温度分布在六个钻孔，表现出显着的温度增加1至2 K的过去50至100年。我们还在三个钻孔的某些特定深度进行了长期温度监测，并观察到时间变化，这表明存在小规模的水对流和季节性变化的地下水流。从进行温度记录的钻孔中采集了地下水样本，还从河流中采集了地表水样本。分析了地下水和地表水的地球化学和稳定同位素特征， ...更多信息 根据2000年勘察的结果，利用2001年采集的Kronotsky国家公园天然生长的落叶松（Larix gmerinii）年轮，建立了422年的堪察加中部年轮宽度指数年表。对观测到的气候年表的响应分析显示，初夏温度显着相关。根据树木年代学资料重建的1624年以来的气温及其对气候的响应，揭示了近130年来的总体变暖趋势和年代际周期振荡。根据钻孔温度剖面重建了韩国三口威尔斯井和日本琵琶湖沿岸一口井的地表温度历史。在韩国，估计的温度变化与附近气象站的气温数据一致。琵琶湖的表面温度历史似乎反映了过去5000年来当地环境的变化。少

项目成果

末田達彦: "木材の材質変動の利用としての年輪年代学"日本木材学会第7期研究分科会報告書. II. 118-126 (2002)

Tatsuhiko Sueda：“Denrochronology 作为木材材料特性变化的应用”日本木材学会第七届研究小组委员会报告 II 118-126（2002 年）。

Yamakawa, W., O. Kobayashi, and T. Sweda: "A tree-ring reconstruction of past temperature for southwest Japan"Proc. International Paleoclimate Reconstruction Workshop. Nov. 2002, Matsuyama, Japan (in press)..

Yamakawa、W.、O. Kobayashi 和 T. Sweda：“日本西南部过去温度的树木年轮重建”Proc。

内田洋平, 大久保泰邦, 宮越昭暢: "地下水データと深部孔井データの孔底温度の比較から求めた関東平野の地温勾配"物理探査. 55. 191-198 (2002)

Yohei Uchida、Yasukuni Okubo、Akinobu Miyakoshi：“通过地下水数据和深井数据之间的钻孔温度比较确定关东平原的地温梯度”物理勘探 55. 191-198 (2002)。

Taniguchi, M: "Estimates of surface climate change and groundwater paleo-recharge rates from deep borehole temperature data"CATENA. 48. 39-51 (2002)

Taniguchi, M：“根据深井温度数据估算地表气候变化和地下水古补给率”CATENA。

Furuta, F., M. Sano, and T. Sweda: "Summer temperature trend over the past 400 years for central Kamchatka reconstructed from tree ring"Proc. International Paleoclimate Reconstruction Workshop. Nov. 2002, Matsuyama, Japan (in press)..

Furuta, F.、M. Sano 和 T. Sweda：“从树木年轮重建堪察加半岛中部过去 400 年的夏季温度趋势”Proc。