New Papers (ELSEVIER) 2025/9/22~2025/10/5

  

 

[Chemical Geology]

1. Testing the robustness of the carbonate uranium isotope proxy: Evidence from a partial dissolution study

Jennifer L. Morford, Maya Elrick, Stephen Romaniello, Thomas J. Algeo, ... Carol de Wet

 

[Earth and Planetary Science Letters]

2. Constraining 200 million years of geodynamic evolution of the North Alpine foreland at million-year resolution using clumped isotopes and U-Pb dating of diagenetic carbonates

Nathan Looser, Lukas Aschwanden, Stephan Wohlwend, Marcel Guillong, Jörg Rickli, Raphael Schneeberger, Stefano M. Bernasconi

3. Disentangling topographic and climatic controls on glacier length: A case study in the tropical Colombian Andes

Joel A. Wilner, Alice M. Doughty, Meredith A. Kelly, Mathieu Morlighem

4. Enhanced deoxygenation and carbon storage in the mid-depth subarctic Pacific during the Bølling-Allerød

Qian Li, Qingping Li, Min-Te Chen, Shouwei Zhou, Jianjun Zou, Xuefa Shi

5. 17Oexcess in Devils Hole calcite: an indicator of equilibrium fractionation and paleo moisture sources

Hagit P. Affek, Eugeni Barkan, Yael Tal, Simon D. Steidle, Kathleen A. Wendt, Christoph Spötl, R. Lawrence Edwards, Ekaterina Fishman, Yuri Dublyansky

 

[Geochimica et Cosmochimica Acta]

6. U-Li Isotopes highlight the dominant role of glacier coverage in weathering processes across Northeast Tibetan Plateau glacial watersheds

Xiaoyu Jiao, Zhiwen Dong, Giovanni Baccolo, Xiang Qin, Yaping Shao

7. Millennial-scale surface water mass changes between the North Atlantic subpolar and subtropical gyre since the last glacial-interglacial cycle

Min Zeng, Harunur Rashid, Sean Lodestro, Jens Gruetzner

8. Impact of Pacific Walker Circulation driven by Interdecadal Pacific Oscillation on precipitation variability in the North China Monsoon Marginal Region over the past five centuries

Xiaoen Zhao, Mao Hu, Feng Chen, Shijie Wang, Tiyuan Hou

9. Spatial-temporal isotope patterns in European winter precipitation reflect atmospheric circulation modes over North Atlantic and Arctic Oceans

Qiyao Fan, Zhongyin Cai, Rong Li, Cheng Wang, Songlin Yu, Xinyi Yu,Lide Tian

10. Anthropogenic activities have greatly altered mangroves over the last hundred years. 

Yao Zhang, Guangming Zhao, Ken W. Krauss, Lianghao Pan, Yuanqin Xu, Xianwei Meng

11. Insights into Quaternary iron fertilization dynamics in the western equatorial Pacific: Proxy archives offshore of northern Papua New Guinea

Zhaokai Xu, Qingchao Fan, Haowen Dang, Shiming Wan, Christophe Colin, Jiawang Wu, Dhongil Lim, Tiegang Li

12. Holocene dust storms and their driving mechanisms on the northeastern Tibetan Plateau

Tiancheng Zhou, Weiyu Cao, Xiaohuan Hou, Yunqing Li, Xianyong Cao, Fang Tian

13. Calibration and application of brGDGT-based temperature parameters in the twilight zone of the South China Sea

Aamir Ali, Jiantao Cao, Chao Huang, Hui Li, Guodong Jia

14. Role of Indonesian throughflow on Indian Ocean warming pattern formation during the recent global warming hiatus in CMIP6 models

Mohan Soumya

15. Enhanced and southward North Pacific subtropical gyre circulation following the intensification of Northern Hemisphere Glaciation

Luyao Tang, Fengming Chang, Jia Wang, Fang Qian, Fang Qian, Junru Zhang Tiegang Li

16. An empirical assessment of dissolved organic carbon fluxes to oceans under climate change

Clément Fabre, Sabine Sauvage, Michelle T.H. van Vliet, Amandine V. Pastor, José-Miguel Sánchez-Pérez

17. A Late Glacial and Holocene sugar biomarker-based δ18O paleoclimate record from the Afro-alpine Central Lake, Bale Mountains, Ethiopia

Samuel G. Chernet, Lucas Bittner, Graciela Gil-Romera, Bruk Lemma, Bruk Lemma, Marcel Bliedtner, Roland Zech, Bruno Glaser, Tobias Bromm, Sönke Szidat, Wolfgang Zech, Michael Zech

18. Did the North Pacific Intermediate Water influence the South China sea during the last glacial?

Kunwen Luo, Ming Su, Ce Wang, Zhi Lin Ng, Junmin Jia, Letian Zeng, Hui Chen, Songlin Yang, Shan Liu

 

[Marine Geology]

19. The utility of mangrove foraminifera, diatoms, and stable carbon isotope and C/N geochemistry in relative sea-level reconstruction in the Pearl River Delta, China

Howard K.Y. Yu, Nicole S. Khan, Nina Desianti, Ed Garrett, Noah J. Planavsky, Ayesha Ahmed

20. 14C dating of tsunami deposits in arid environments: How challenging can it be? The example of La Graciosa, Canary Islands

Raphaël Paris, Franck Lavigne, Christine Hatté, Juan Francisco Betancort, Jean-Pierre Flandrois, Arnauld Vinçon-Laugier, Eve Poulallion, Simon Falvard, Bachtiar W. Mutaqin, Christophe Lécuyer

21. Sedimentary records of mid-Holocene extreme storm events and Neolithic cultural response in the Yaojiang-Ningbo Plain, East China

Fangyou Lin, Shuwen Mei, Hao Xu, Maojie Yang, Michael E. Meadows, Zhanghua Wang

22. The Bering Sea shelf as a sink for terrigenous organic carbon: Insights from sediment geochemistry

Song Zhang, Zhongqiao Li, Bassem Jalali, Youcheng Bai, Zhongqiang Ji, Hongliang Li, Haiyan Jin, Jianfang Chen

 

 [Palaeogeography, Paleoclimatology, Paleoecology]

23. Luminescence dating of core sediments from Jining of Shandong Province in the lower Yellow River Plain and its geomorphological implications

Weitao Yuan, Bohui Liu, Zhiyan Wu, Yongkui Wang, Zengbing Sun, Xiaojun Zhou, Ruonan Tian, Bingpeng Yan, Zhongping Lai

24. Paired stable carbon isotope in carbonate and Cladophora: A novel and quantitative proxy for palaeolake level variations on the northeastern Qinghai-Tibet Plateau

Yixuan Li, Xiangzhong Li, Shutao Huang, Jie Lin

25. Holocene vegetation dynamics and abrupt biodiversity shifts in the Zoige Basin, Northeastern Tibetan Plateau

Weihe Ren, Xiangqi Zhang, Chen Liang, Quan Li, ... Guitian Yi

26. Long-term biotic responses and anthropogenic impacts in dryland lake ecosystems of northwestern China over the past two centuries

Lixiong Xiang, Dongliang Zhang, Wenjia Wang, Muhammad Farqan, Xueqing Song, Chuangzi Yan, Yuan Li, Xuemei Chen, Mingrui Qiang, Guangjie Chen, Ke Zhang, Jianbao Liu, Xiaohua Gou, Erik Jeppesen, Xiaozhong Huang

27. Precipitation changes in eastern Kazakhstan over the last 2200 years based on pollen records

Aizhi Sun, Dongliang Zhang, Junxing Du, Xueyin Li

28. Filling the gap of the late Quaternary planktonic foraminifera record in the Western Mediterranean: Paleoceanographic changes in the Ligurian Sea over the last 27.4 ka

Pierluigi Martinelli, Laura Bronzo, Sergio Bonomo, Isabel Cacho, Antonio Cascella, Letizia Di Bella, José-Abel Flores, Jaime Frigola,, Fabrizio Lirer, Fabrizio Michelangeli, Mar Selvaggi, Francisco J. Sierro, Rocco Gennari

29. Precipitation variations around ∼4.2 ka BP in the Luoyang Basin: A pollen-based quantitative reconstruction

Liang Chen, Zhengchuang Hui, Zijuan Yong

30. Intense tropical cyclone activity over the past 2000 years at Bay of Islands, Fiji

Yanan Li, Jeffrey P. Donnelly, Nicole d'Entremont, James F. Bramante, James F. Bramante,Shu Gao

31. New insights into the Holocene temperature conundrum from long-chain alkyl diol paleothermometers in the East China Sea inner shelf

Lilei Chen, Feng Li, Jian Liu, Xiaoyong Duan, Xingliang He, Bin Chen, Maogang Qin

32. Holocene hydroclimate inferred from alkane isotope and pollen records from monsoonal northern Australia

Michael I. Bird, Michael Brand, Rainy Comley, Xennephone Hadeen, Niels C. Munksgaard, Cassandra Rowe, Christopher M. Wurster, Costijn Zwart

33. Reconstruction of vegetation, climate, fire and human activity at an Iron Age oasis site in Lizq, northern Central Oman, beginning in 400 cal yr BCE.

Julia Unkelbach, Hermann Behling, Conrad Schmidt

34. Fish tooth oxygen isotopes as indicators of Lutetian seawater paleotemperatures and paleoecology in the tropical Neo-Tethys (Arabian Platform)

Matthieu Deville de Periere, Michael M. Joachimski, Sabyasachi Chattopadhyay, Guillaume Guinot, Sylvain Adnet

35. Dynamic response of global atmospheric circulation to Northern Hemisphere ice sheet growth and decay

Nicholas S. Bill, Morten S. Riishuus

36. Late glacial to Holocene vegetation history and quantitative reconstruction of climate in semiarid areas of China: A case study of Angulinur Lake

Xu-Ran Zhang, Hua-Yong Zhang, Zhao Liu

37. Tetraether-based temperature record from Lake Xingyun in southwestern China since late MIS3 and implication for regional differences in temperature reconstruction

Haiyang Yu, Xu Wang, Ming Ji, Shihao Zhang, Gaochao Pan, Licheng Guo , Linlin Cui, Xueyun M, Wubiao Li, Dongsheng Li

38. Geochemical behavior of redox sensitive trace metals in marine environment and their applications as paleoredox proxies

Guo Ning, Jiang Wei, Li Yueer, Yu Kefu

39. Multi-proxy sedimentary records in the northeastern South China Sea: Implication for sea level and East Asian Summer Monsoon evolution since 13 ka BP

Zili Yang, Kedi Wang, Wei Xu, Jingping Xu, Meng Liu, Lisha Hu

40Centennial- to multidecadal-scale monsoon precipitation variability during the mid-Holocene.

Yifei Wang, Zhenqiu Zhang, Yongjin Wang, Kan Zhao, Yijia Liang, Kui Gao, Jianshun Chen, Qingfeng Shao, Zeji Lu

41. Hydroclimate changes in southwestern China from Dark Age Cold Period to Medieval Climate Anomaly and their global teleconnections

Bin Zhao, Kan Zhao, Yaoqi He, Yongjin Wang, Qingfeng Shao, Hai Cheng

 

[Quaternary International]

42. Luminescence dating on ceramics from the Tianjun Shilin Cave around Qinghai lake in the northeastern Qinghai-Tibet plateau

Qiang Peng, Manping Sun, Yongjuan Sun, Yunkun Shi, Yanyan Li, Chongyi E

43. Leveraging radiocarbon in the Central Andes: From chronologies to research agendas

Daniel A. Contreras, Erik J. Marsh, Kurt Rademaker

 

[Quaternary Research]

44.   Select Latest Pleistocene (17,500–13,500 cal yr BP) Arctic ground squirrel (Sciuridae: Urocitellus parryii) middens record late persistence of steppe-tundra in central Yukon Territory

Latest Pleistocene (17,500–13,500 cal yr BP) Arctic ground squirrel (Sciuridae: Urocitellus parryii) middens record late persistence of steppe-tundra in central Yukon Territory

Scott L. Cocker, Diana Tirlea, Evan Francis, Svetlana Kuzmina, Grant D. Zazula, Duane G. Froese

 

2025年地球化学会年会に行ってきました

こんにちは、横山研D2の阪本です！ 9/17〜9/19に仙台の川内キャンパスにて開催された地球化学会に、横山研からは修士２年の今宮と、阪本、それから横山先生の3人で参加してきました！

地球化学について、学会HPでは以下のように書かれています。

太陽-惑星系の形成と進化、地球内部に存在する物質の構造とその進化、さらには大気圏・水圏を含む地球表層や生命の誕生と進化などを「化学」を用いて探求する学問分野です。地球化学は、元素、同位体、化学種の存在度、分布、移動、変化を空間的あるいは時間的に取り扱い、それらを支配する法則や原理を見つけだすことにより、地球や太陽系の様々な現象の解明を目指しています。隕石や月試料などの地球外物質を対象とする宇宙化学も含めて地球化学と呼びます（地球化学会HP）

ここにあるように、高校理科で言う地学と化学を合わせたような、非常に広い研究対象が扱われています！

川内キャンパス

今宮くんと阪本は、黒田研の太田さんと一緒に学生懇親会にも参加し、同学年の学生と交流しました！二人の発表は1日目に終わり、それぞれ今宮くんはポスター発表、阪本は口頭で発表しました！

阪本（右端）は学生優秀賞をいただきました！
地球惑星科学専攻の学生がなんと4人受賞！

横山先生の発表も最終日にあり、AMSでの研究業績の紹介やPIMSの導入状況などについてお話しされました！！

学会の中日には懇親会も実施され、牛タンやご当地の美味しいお酒をいただきました〜

牛タンなどの美味しい仙台の料理を堪能しました！

帰りの駅弁！

とても充実した3日間でした！！

追記：学会前の週から腰が痛くて整形外科でリハビリを受けたりしていたのですが、学会でたくさん歩いて運動したらだいぶ良くなりました。運動不足は怖いですね。

25th Radiocarbon Conference

 皆さんこんにちは！修士2年の今宮です。

7月にクラクフ (ポーランド) にて開催された「25th Radiocarbon Conference」に参加してきたので様子を紹介します！

「放射性炭素同位体」横山研を知っている方なら耳にしたことがあるはずです。

Radiocarbon Conferenceは放射性炭素同位体を用いた研究をする世界中の研究者が集まる、三年に一度のビッグな学会です。

年代測定に使っている研究や、私のように核実験由来の14Cを見る研究、あるいは犯罪捜査への応用など、14Cにまつわる幅広い研究発表が行われていました。

論文を拝見したことのあるような著名な先生方があちらこちらにいらっしゃって、芸能人を目撃したような気分でした。

AGH University ハリーポッターみたいでカッコイイ

初めてのEU & 初めての英語での発表でかなり緊張しましたが、同じ同位体を見ている、いわば共通の趣味があるような安心感のおかげで、初日のポスター発表では様々な意見交換ができました。

会場で隣同士だった学生とは、夕食を共に食べるほど仲良くなれました！

広場で食べたZapiekanka
ボリューミーなピザパンです

意見交換でいえば、学会期間中は4-5セッションごとにコーヒーブレークがあり、ホテルのスイーツビュッフェをつまみながら休憩できるようになっています。

ランチブレークも含め、1日に結構周りの人と話す場があるのが、日本での学会とは異なるなぁと思いながら参加していました。

コーヒーブレークの様子

また、国際学会といえば懇親会 (banquet) ですね！大学附属のブルワリー (羨ましい) にて、吹奏楽を楽しみながら食事を楽しみ、現地でできた友人と最後の夜を楽しみました。

懇親会後半では、会場内BGMに合わせて踊る人が続出。欧州文化を体験すべく、とりあえず私も参加してみました。練習が必要ですね。

会場のブルワリー

素晴らしい懇親会でした

最後に、クラクフの街並みと料理を紹介します。

クラクフはかつてポーランド王国の首都として栄え、世界で最も歴史のある都市のひとつです。

ホテル周辺は絵のような綺麗な中世の町並みが広がり、広場には馬車まで走っています。

歴史を感じさせる遺産も多く、同時に、かの世界大戦の悲劇を思い起こさせる場所も多く残されています。

ポーランド王宮殿のヴァヴェル城 築1000年です

今回滞在したKazimierz地区はユダヤ人街で、
映画『シンドラーのリスト』の舞台です

ポーランド流餃子のPierogi
食器も可愛いですね

街全体が美しく、料理もおいしく、学びのある場所であるのでぜひまた訪れたいと思います。

、、、、まずは学会誌投稿用の論文執筆に注力します！！！

Golden Week Cruise ~ KS-25-4

Hi this is Cat!

In May this year, I had the pleasure of spending 10 days at sea on the R/V Shinsei Maru. Together with researchers from other universities, Wataru and I explored the Kuroshio Extension (KE) region located in the Western North Pacific Ocean. 

The R/V Shinsei Maru in Kochi Bay.

The KE plays an important role in global ocean circulation and regional climate variability. Importantly, the KE region is the strongest sink for atmospheric carbon dioxide in the North Pacific Ocean. Particularly, the formation of  North Pacific Subtropical Mode Water (STMW). The surface layer of the ocean cools in winter, drawing down lots of carbon dioxide because it is more soluble in cold waters. This carbon-rich layer subducts into the deep ocean and is removed from the atmosphere.

I am measuring the radiocarbon content of the seawater I collected to better understand STMW mixing processes. We collected water samples from two stations using a CTD attached to a rosette sampler. 

CTD rosette sampler.

We planned to collect more samples (6 stations) but had to change our plan due to bad weather. I am grateful to the captain of the ship for navigating the poor conditions and always keeping us safe.

I got to operate an XCTD for the first time. Wearing a harness, I attached myself to the edge of the boat and launched a probe into the ocean. FUN!

Wataru in harness with XCTD.

I spent much time on this cruise writing in my journal, watching movies, and studying kanji. It was an adventure and I hope to go on another cruise in the near future. 

Group photo.

Tohoku Field Trip

Hello this is Jess!

In August I travelled to Kadonohama, Iwate Prefecture, for two days of fieldwork collecting sediment from an outcrop. A huge thank you to Yokoyama-sensei, Ishizawa-san and Kai for all their help with preparation and sampling!

 

Yokoyama-Sensei, Ishizawa-san, Kai and myself

Completing fieldwork at the outcrop

At Kadonohama, I retrieved 81 cube samples across two sites. At both sites, two tsunami deposits were identified via the intrusion of large pebbles. Tsunami deposits form when sediment is ripped up, transported, and redeposited during a tsunami’s run-up, inundation and backwash. Tsunami deposit characteristics vary depending on the surrounding environment. As Kadonohama has a rocky beach setting the intrusion of tsunami is identified through the movement of these larger pebbles further inland.

Tsunami deposits identified at Kadonohama

By contrast, at Kiri-Kiri (also in Iwate Prefecture), which has an orange-coloured sandy beach, tsunami deposits are identified by the intrusion of this distinct, orange-coloured sand.

 

Tsunami Deposits identified at Kiri-Kiri, Iwate Prefecture

At Kadonohama, we also found evidence of clay pots. These have previously been identified as related to salt farming activities within the region, which adds an interesting layer to the study area.

Red/orange sediment is evidence of clay pots and have previously been identified as from salt farming occuring within the region.

The samples collected from this region will undergo radiocarbon dating to determine the age of the tsunami deposits and to correlate the tsunami deposits to other studies that have been completed along the Sanriku Coast. This will help in building a broader picture of past tsunami events within the region.