田军
个性化签名
- 姓名:田军
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
海洋地质学
- 研究兴趣:
田军,博士,1974年8月生
学习经历:
B.A. (1992-1996), 地质学,中国地质大学地球科学学院(武汉).
M.S.(1996-1999), 地层古生物,中国地质大学地球科学学院(武汉).
Ph.D (1999-2002), 海洋地质,同济大学海洋与地球科学学院.
访问学生 (28/2/2002 – 31/03/2002), Université catholique de Louvain Institut d’Astronomie et de Géophysique G. Lemaître Chemin du Cyclotron 2, University of Louvain-la-Neuve, Belgium.
访问学者 (1/11/2003 – 26/12/2003), Institute for Geosciences, Olshausenstr, Kiel University, Germany.
亚历山大.冯.洪堡学者 (Alexander Von Humboldt Fellowship) (06/08/2006-02/27/2008), MARUM-Research Centre Ocean Margins, Bremen University, Germany.
工作经历:
教 授, 2009年12月至今, 同济大学海洋与地球科学学院;
副教授, 2005年6月-2009年11月, 同济大学海洋与地球科学学院;
讲 师, 2003年4月-2005年5月, 同济大学海洋与地球科学学院;
科研项目:
主持项目
1、自然科学青年基金项目-“地球轨道驱动的半岁差周期及其在南沙海区的响应”,2004.1-2004.12;
2、自然科学基金面上项目-“北极冰盖形成期南沙表层海水对地球轨道周期变化的响应”,2005.1-2007.12;
3、自然科学基金面上项目-“氧同位素5期以来热带西非季风气候的高分辨率海洋记录”,2008.1-2010.12;
4、自然科学基金面上项目-““蒙特利碳位移”末期太平洋中深层水团重组”,2010-1-2012.12;
5、教育部新世纪优秀人才支持计划项目-“中中新世太平洋中、深层水团变化与全球变冷”,2009-1-2011.12;
6、全国百篇优秀博士论文作者专项基金-”70,000年以来千年尺度上的东亚季风演化–来自南沙的气候记录”,2006.1-2010.12;
7、上海市青年科技启明星项目-”氧同位素5期东亚季风与印度尼西亚穿越流的对比研究”,2006.9-2008.9;
8、上海市青年科技启明星跟踪项目-“末次冰期旋回中西非气候变化的海陆响应”,2010.3-2012.3;
9、第十一届霍英东高等院校青年教师基金-“晚更新世热带西大西洋千年尺度的季风气候”,2008.1-2010.12。
参与项目
1、国家自然科学基金委创新研究群体项目
2、科技部973课题“大洋碳循环与气候演变的热带驱动”二级课题”“大洋系统碳循环的轨道周期”
3、上海市科委国际合作项目“气候长期变化的新机制:中国和意大利的地质证据”
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主页访问
1970
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关注数
0
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成果阅读
1000
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成果数
20
田军, Jun Tian a, *, Enqing Huang a, Dorothy K. Pak b
Palaeogeography, Palaeoclimatology, Palaeoecology 292(2010)319-324,-0001,():
-1年11月30日
High-resolution planktonic foraminifer Mg/Ca sea surface temperature (SST) and δ18O records of IMAGES core MD052896 from the southern South China Sea (SCS) provide a history of East Asian winter monsoon variability over the past 23 kyr. Specifically, we find that the latitudinal SST gradient of the north-south SCS shows promise as a useful proxy of East Asian winter monsoon changes. The ΔSST record of core MD052896 from the southern SCS and ODP site 1145 from the northern SCS documents several positive anomalies indicating East Asia winter monsoon maxima during cold periods of the past 23 kyr, including the H1 and Younger Dryas events. The ΔSST record also indicates that after ∼8.5 ka the East Asian winter monsoon strengthened relative to the deglaciation, reaching levels of the last glacial period. Comparison of the SCS ΔSST record with stalagmite δ18O records suggests that both the East Asian summer and winter monsoons strengthened from the last glacial to the Holocene, and that summer and winter monsoon strength probably are not anti-correlated, at least over the last glacial–interglacial cycle.
East Asian winter monsoon,, South China Sea,, Millennial scale,, Last glacial/, interglacial cycle
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田军, Jun Tian a, ⁎, Amelia Shevenell b, c, Pinxian Wang a, Quanhong Zhao a, Qianyu Li a, Xinrong Cheng a
Palaeogeography, Palaeoclimatology, Palaeoecology 284(2009)375-382,-0001,():
-1年11月30日
Changes in intermediate and deep ocean circulation likely played a significant role in global carbon cycling and meridional heat/moisture transport during the middle Miocene climate transition (∼14 Ma). Highresolution middle Miocene (16-13Ma) benthic foraminifer stable isotope records from the South China Sea reveal a reorganization of regional bottom waters, which preceded the globally recognized middle Miocene -1‰ δ18O increase (13.8Ma) by 100,000 years. An observed reversal of the benthic foraminifera δ13C gradient between ODP Sites 1146 (2092 m) and 1148 (3294 m; 13.9-13.5 Ma) is interpreted to reflect an increase in the southward flux of low δ13C deep (>2000m) Pacific Ocean waters (Flower and Kennett, 1993; Shevenell and Kennett, 2004). Large-scale changes in Pacific intermediate and deep ocean circulation, coupled with enhanced global carbon cycling at the end of the Monterey Carbon Isotope excursion, likely acted as internal feedbacks to the Earth's climate system. These feedbacks reduced the sensitivity of Antarctica to lower latitude-derived heat/moisture and facilitated the transition of the Earth's climate system to a new, relatively stable glacial state.
Middle Miocene,, Monterey carbon isotope excursion,, Oceanic circulation reorganization,, Global cooling
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【期刊论文】Late Pliocene monsoon linkage in the tropical South China Sea
田军, Jun Tian a, b, *, Dorothy K. Pak c, Pinxian Wang a, David Lea c, Xinrong Cheng a, Quanhong Zhao a
Earth and Planetary Science Letters 252(2006)72-81,-0001,():
-1年11月30日
The onset of Northern Hemisphere Glaciation (NHG) -2.7Ma ago coincided with prominent climate changes in the tropical regions such as the African and the Asian monsoons. However, the relationship between tropical and sub-tropical monsoonal variations and high northern latitude ice sheet expansion as well as processes such as late Pliocene tropical sea surface temperature (SST) change is not clear. Our late Pliocene (2.5-3.3Ma) monsoon proxy records and Mg/Ca derived SST records at Ocean Drilling Program (ODP) Site 1143 from the southern South China Sea (SCS) reveal that while tropical SST shows a stepwise decrease of 2-3℃ during this period, the East Asian monsoon gradually strengthens in response to the onset of the NHG. At the 41-kyr and 23-kyr bands, ice volume change lags tropical SST by -4 kyr, but leads the East Asian monsoon by -12-17 kyr. Our finding highlights the significant role of the tropical Pacific region in driving global climate change in the late Pliocene, which has invariable leading phase relative to the ice volume change as in the late Pleistocene. However, the East Asian monsoon shows a linear response to the onset of the NHG in the late Pliocene, with much bigger phase lagged at the 41-kyr and 23-kyr bands than in the Pleistocene, which suggests that at the obliquity and precession bands the phases of the Plio-Pleistocene East Asian monsoon variations relative to the global ice volume changes are not constant, but variable. Therefore, the East Asian monsoons are not only simply driven by northern summer insolation at the precession period but also modulated by global ice volume change in high latitudes.
ODP, South China Sea, Pliocene, monsoon, tropics
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田军, Jun Tiana, b, *, Pinxian Wanga, Xinrong Chenga
Quaternary Science Reviews 23(2004)2007-2016,-0001,():
-1年11月30日
Oxygen isotope records of the surface-dwelling foraminifer Globigerinoides ruber from ODP Site 1143 in the southern South China Sea (SCS) are presented for the last 5Ma. The G. ruber d18O of Site 1143 for the past 500 ka is lighter by 0.5-1.0% in interglacial, and by 0.1-0.5%in glacial periods, than the Site 806B record from the Ontong Java Plateau. We infer the light glacial/interglacial G. ruber d18O at Site 1143, compared with the open western Pacific, to have been caused by stronger monsoon-induced precipitation over the SCS. While glacial/interglacial planktonic d18O values remained stable over the 3.3-2.5Ma period, the benthic Cibicidoides wuellerstorfi d18O gradually became positive, leading to an obvious slope in their d18O difference (Dd18Ob p). The stable glacial/ interglacial G. ruber d18O over this period is probably caused by the decrease of sea surface salinity, which counteracted the effects of global ice volume and sea surface temperature on the G. ruber d18O. We interpret that the intensification of the East Asian monsoon winds coupled with the northern hemisphere glaciation 3.3-2.5Ma ago likely brought frequent and strong precipitation over the SCS and/or caused large-scale intrusions of Borneo alongshore low-salinity waters to the southern SCS, which greatly freshened the SCS and decreased its salinity. After 2.5 Ma, especially in the Quaternary period, the planktonic and benthic d18O show similar variations over glacial/interglacial cycles in responding to the waxing and waning of the northern hemisphere continental ice sheet, and their relatively stable d18O difference (Dd18Ob p) indicates a period of steady fluctuations of the East Asian monsoon winds. The more positive values of Dd18Ob-p probably suggest stronger East Asian winter monsoon during Quaternary glacials whereas the more negative values of Dd18Ob-p may imply stronger East Asian summer monsoon during Quaternary interglacials.
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田军, Jun Tian a, Pinxian Wang a, Xinrong Cheng a, Qianyu Li b
Earth and Planetary Science Letters 203(2002)1015-1029,-0001,():
-1年11月30日
Based on benthic foraminiferal N18O from ODP Site 1143, a 5-Myr astronomical timescale for the West Pacific Plio^Pleistocene was established using an automatic orbital tuning method. The tuned Brunhes/Matuyama paleomagnetic polarity reversal age agrees well with the previously published age of 0.78 Ma. The tuned ages for several planktonic foraminifer bio-events also agree well with published dates, and new ages for some other bio-events in the South China Sea were also estimated. The benthic N18O from Site 1143 is highly coherent with the Earth’s orbit (ETP) both at the obliquity and precession bands for the last 5 Myr, and at the eccentricity band for the last 2 Myr. In general, the 41-kyr cycle was dominant through the Plio^Pleistocene although the 23-kyr cycle was also very strong. The 100-kyr cycle became dominant only during the last 1 Myr. A comparison of the benthic N18O between the Atlantic (ODP 659) and the East and West Pacific (846 and 1143) reveals that the Atlantic Pacific benthic oxygen isotope difference ratio (vN18OAtl Pac) displays an increasing trend in three time intervals: 3.6-2.7 Ma, 2.7-2.1Ma and 1.5-0.25Ma. Each of the intervals begins with a rapid negative shift in vN18OAtl Pac, followed by a long period with an increasing trend, corresponding to the growth of the Northern Hemisphere ice sheet. This means that all three intervals of ice sheet growth in the Northern Hemisphere were accompanied at the beginning by a rapid relative warming of deep water in the Atlantic as compared to that of the Pacific, followed by its gradual relative cooling. This general trend, superimposed on the frequent fluctuations with glacial cycles, should yield insights into the processes leading to the boreal glaciation. Cross-spectral analyses of the vN18OAtl Pac with the Earth’s orbit suggests that after the initiation of Northern Hemisphere glaciation at about 2.5 Ma, obliquity rather than precession had become the dominant force controlling the vertical structure or thermohaline circulation in the paleo-ocean.
stable isotopes, astronomical time scale, South China Sea, Pliocene, Pleistocene, Atlantic Ocean, Paci¢c Ocean
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【期刊论文】Forcing mechanism of the Pleistocene east Asian monsoon variations in a phase perspective
田军, TIAN Jun, , WANG Pinxian, CHENG Xinrong, WANG Rujian & SUN Xiangjun
Science in China Ser. D Earth Sciences 2005 Vol. 48 No.10 1708-1717,-0001,():
-1年11月30日
The deep sea records from the ODP Sites 1143 and 1144 in the northern and southern South China Sea (SCS), including foraminiferal δ 18O and δ 13C, Opal% and pollen percentage, reveal that the variations of the east Asian monsoon have been closely correlated with the variations of the Earth’s orbital parameters (eccentricity, obliquity and precession) and the global ice volume on orbital scale. All the monsoonal proxies show strong 100 ka, 41 ka and 23 ka cycles. Although G. ruber δ 13C of Site 1143 is coherent with the ETP (ETP= normalized (eccentricity + obliquity-precession) at eccentricity, obliquity and precession bands, most of the coherent relationship focuses on the precession band, and the other monsoonal proxies are coherent with the ETP only at the precession band, which indicate that precession dominates the Pleistocene tropical climate changes. The phase relationship of the monsoonal proxies with the foraminiferal δ 18O implies that the global ice volume changes have played a significant role in modulating the east Asian monsoon climate, at least dominating the winter monsoon. This forcing mechanism of the east Asian monsoon is apparently different from that of the Indian ocean mon-soon. The variations of the east Asian monsoon at the precession band, at least that of the winter monsoon, have been controlled not only by the sensible heating but also by the latent heating of the surface water in the South China Sea.
South China Sea,, ODP,, east Asian monsoon,, orbital forcing,, global ice volume.,
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田军, TIAN Jun, WANG Pinxian & CHENG Xinrong
Science in China Ser. D Earth Sciences 2004 Vol. 47 No.10 943-953,-0001,():
-1年11月30日
The foraminiferal δ 18O and δ 13C records for the past 5 Ma at ODP Site 1143 reveal the linear responses of the Plio-Pleistocene climatic changes in the southern South China Sea to orbital forcing at the obliquity and precession bands. The phase of the δ 18O variations with the orbital forcing is opposite to that of the δ 13C, which may be caused by the frequent El Niño events from the equatorial Pacific. The amplification of the Northern Hemisphere Ice Sheet at -3.3 Ma probably affected the development of the 100-ka climatic cycles. Its further spreading may spur the 100-ka climatic cycle to become the dominant cycle in the late Pleistocene. The "Mid-Pleistocene Transition" event has localized influence on the isotopic variations in the southern South China Sea. The foraminiferal δ 13C records for the past 5 Ma at Site 1143 are highly co-herent with the orbital forcing at the long eccentricity band, and lead the δ 18O records at the shorter eccentricity band, highlighting the importance of the carbon cycle in the global climate change.
southern South China Sea,, ODP,, oxygen and carbon isotope,, orbital forcing.,
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田军, Tian Jun, Wang Pinxian, Cheng Xinrong
Journal of China University of Geosciences, Vol. 15, No.3, p. 283-289, September 2004,-0001,():
-1年11月30日
The continuous wavelet transform (CWT) analysis reveals the instantaneous variability of the foraminiferal δ18O and δ18O of Site 1143 for the past 5Ma at the eccentricity, obliquity and precession bands. The cross CWT analysis further demonstrates nonstationary phases of the benthic δ18O relative to ETP at the three primary Milankovitch bands in the last 5Ma. The instantaneous phases between benthic δ18O and δ18O at the precession band display a prominent 128ka period, probably the cyclicity of the nonstationary climate close to the eccentricity. To explain these nonstationary phases, it is desirable to introduce a nonlinear response model to the global climate system, in which the output has a prominent cycle around 100 ka to match the 128 ka cycle of the instantaneous phase of the δ18O and δ18O on the precession band.
wavelet analysis,, foraminiferal,, isotopes,, South China Sea.,
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【期刊论文】Exploring cyclic changes of the ocean carbon reservoir
田军, WANG Pinxian, TIAN Jun, CHENG Xinrong, LIU Quanlian & XU Jian
Chinese Science Bulletin 2003 Vol. 48, No.23, 2536-2548,-0001,():
-1年11月30日
A 5-Ma record from ODP Site 1143 has revealed the long-term cycles of 400
ODP Leg 184,, South China Sea,, tropical forcing,, carbon cycling,, orbital periodicity.,
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【期刊论文】Transition of Quaternary glacial cyclicity in deep-sea records at Nansha, the South China Sea
田军, WANG Pinxian, TIAN Jun & CHENG Xinrong
SCIENCE IN CHINA (Series D) October 2001 Vol. 44 No. 10,-0001,():
-1年11月30日
High-resolution oxygen isotope records over the last 2249 ka (MIS 1 86) have been obtained from cores of the upper section (105.08m) at ODP Site 1143 (water depth of 2772m) drilled in the Nansha area, southern South China Sea. The sampling resolution is at about 2 ka intervals, resulting in one of the best oxygen isotope records over the global ocean. The oxygen isotope curves, displaying details in the Pleistocene glacial cycles, have revealed a nearly 300ka long stage of transition from a predominant 40 ka to 100 ka periodicity. Therefore, the "Mid-Pleistocene Revolution" should be considered as a process of transition rather than an abrupt change. Within the 100 ka glacial cycles, the changes in tropical sea surface water were found to lead those in high-latitude ice sheet. Our comparisons show that the ice sheet expansion and the glacial stage extension in the Northern Hemisphere with the 100 ka cycles must have been driven not by ice sheet itself, but by processes outside the high latitudes of the Northern Hemisphere.
Quaternary,, glacial cycles,, Mid-Pleistocene Revolution,, oxygen isotope stages,, Nansha area.,
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