Mitsuo Suzuki

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Ancient Deforestation and Surface Environmental Change at Tagajyo Archeological Site, Northeastern Japan, from High-resolution Vegetation Reconstruction

Kikan Chirigaku (2013)

Akihiro Yoshida Mitsuo Suzuki

宮城県多賀城跡鴻ノ池地区における堆積物の14C年代測定，テフラ年代，花粉分析，出土材の樹種同定の結果から，多賀城周辺における高時間分解の植生復元を行った。この復元に基づき，多賀城周辺における古代の森林伐採と栽培植物を考察した。さらに，仙台平野周辺の考古資料をまとめ，古代の大和政権の東北進出に伴った広域的な森林伐採と地形形成への影響を検討した。多賀城周辺の丘陵地では，多賀城の築造前はコナラ属やクマシデ属など落葉広葉樹の自然林が分布していた。多賀城の築造後，丘陵地では森林伐採が行われ，陽地性で乾燥環境を好む草本植生が広がった。その後，継続的な森林伐採は，丘陵地の土壌侵食を増大させ，8世紀後半にはアカマツ二次林が成立した。9世紀初め以降には森林伐採が緩和し，丘陵地ではブナ属やコナラ亜属の二次林となった。多賀城の築造後，多賀城周辺の沖積平野では，人口増加を背景にして，大規模な水田稲作や畑作が開始した。一方，仙台平野周辺では，大和政権の進出に伴って窯業や製鉄業が盛んに行われるようになり，広域的な森林伐採が行われた。この森林伐採は，仙台平野への土砂流出を招き，7∼9世紀以降の海岸線の前進速度を増加させた可能性が高い。

Deforestation

Environmental change

10.5190/tga.64.155

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Citations (1)

Reconstruction of northeast Asia spring temperature 1784–1990

Climate of the past (2013)

Motonari Ohyama Hitoshi Yonenobu Jongnam Choi W.-K. Park Masao Hanzawa

Abstract. We describe a first attempt of wide-area dendroclimatic reconstruction, based upon seven spring temperature-sensitive chronologies from the ring widths of living trees, in Japan and Korea. Mean March–May temperature derived from a gridded land air temperature dataset (CRUTEM4) between 35–40° N and 125–140° E was reconstructed for the period of AD 1784–1990. Of the seven, two Japanese chronologies were eliminated during the calibration trials. The reconstruction accounted for 19.4% of the temperature variance in the calibration period, and is considered to be skillful for estimating interannual-to-interdecadal variations and not for long-term change. This reconstruction showed remarkably similar fluctuations to regional dendroclimatic reconstructions in Japan and Korea, indicating the past spatial coherency of spring temperatures in the region. The reconstruction was validated against other climate proxies. A fairly good agreement was found with cold periods as estimated from documentary records in southeast China and Japan. The west Japan temperature series recovered from instrumental records also showed a reasonable agreement with the reconstruction. On the other hand, the reconstruction did not show clear abrupt depressions after the Laki and the Tambora eruptions. These comparisons revealed that dendroclimatic spatial reconstruction in this area offers a good potential for reconstructing long-term and large-scale past temperature patterns for northeast Asia.

Dendroclimatology

10.5194/cp-9-261-2013

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Citations (17)

A Preliminary Description on Fossil Woods Collected from Site BG-X, West of Baragoi, Kenya

African study monographs. Supplementary issue. (1987)

Mitsuo Suzuki

10.14989/68330

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Citations (3)

History of natural disasters and vegetation change uring the Holocene in Miyatojima Island, northeastern Japan

The American Journal of Gastroenterology (2013)

Akihiro Yoshida Hideaki Matsumoto Mitsuo Suzuki

10.14866/ajg.2013a.0_100080

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Citations (0)

Larix-Picea forests of the Last Glacial Age on the eastern slope of Towada Volcano in northern Japan

Review of Palaeobotany and Palynology (1997)

Shuichi Noshiro Kazuo Terada Sei-ichiro Tsuji Mitsuo Suzuki

Larix gmelinii

Macrofossil

10.1016/s0034-6667(97)00034-1

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Citations (19)

Gas-phase synthesis of ultrafine particles and thin films of Y-Al-O by the spray-ICP technique

Journal of Aerosol Science (1993)

M. Kagawa Mitsuo Suzuki Y. Mizoguchi T. Hirai Yasuhiko Syono

Deposition

Particle (ecology)

Crystal (programming language)

10.1016/0021-8502(93)90007-v

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Citations (16)

Tree-ring study of a Late Holocene forest buried in the Ubuka Basin, southwestern Japan

IAWA Journal (2012)

Masataka Hakozaki Katsuhiko Kimura Sei-ichiro Tsuji Mitsuo Suzuki

Buried trees in the Ubuka Basin, southwestern Japan, were investigated to identify the wood species and to build tree-ring chronologies. A total of 65 trees were collected belonging to three species: Japanese cedar ( Cryptomeria japonica , 63 trees), Japanese nutmeg tree ( Torreya nucifera , one tree) and Hinoki cypress (Chamaecyparis obtusa, one tree). Crossdating of the individual ring-width series resulted in four independent tree-ring chronologies covering 605, 576, 507 and 395 years. The absolute ages of these chronologies were determined to be 3676, 4166, 4576 and 4876 cal BP by definite-gap sequence modeling of radiocarbon dates measured at a constant gap of 30 years. An extremely long, continuous chronology can probably be developed in the future by increasing the number of samples at this site.

Cryptomeria

Chamaecyparis

Cypress

Chronology

Taxodium

10.1163/22941932-90000094

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Citations (1)

Dendrochronology of Forests Buried in Hachinohe Tephra on the Eastern Slope of Towada Volcano, Northern Japan.

The Quaternary Research (Daiyonki-Kenkyu) (1994)

Kazuo Terada Sadaaki Ohta Mitsuo Suzuki Shuichi Noshiro Sei-ichiro Tsuji

青森県十和田湖東方には, 十和田火山起源の十和田八戸テフラにおおわれた最終氷期 (約12,650年前) の埋没林が広い地域で確認される. その埋没林から採集した埋没樹木22個体 (トウヒ属14個体, カラマツ属5個体, モミ属3個体) に年輪年代学の手法を適用したところ, トウヒ属とモミ属では属内でもまた属間でもクロスデイティングができた. しかしながら, すべて倒木状態で産出したカラマツ属は, 属内においても属間でもクロスデイティングができなかった. また, 樹皮の残存したトウヒ属8個体とモミ属3個体の立木の最終形成年輪の形成年が, クロスデイティングの結果, 一致したことから, 同じ年に死滅したことがわかった. さらに, この最終形成年輪の年輪構造の詳細な検討から, その年の晩材形成がすでに終了していることがわかった. 以上のことから, この埋没林は, ある年の秋から次の春までの間に起きた十和田火山の噴火により, 短時間のあいだに埋積され, 一斉に枯死したことが明らかになった.

10.4116/jaqua.33.153

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Citations (16)

Thin films of chromium oxide compounds formed by the spray-ICP technique

Journal of Crystal Growth (1990)

Mitsuo Suzuki M. Kagawa Yasuhiko Syono T. Hirai

Crystal (programming language)

10.1016/0022-0248(90)90593-a

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Citations (14)

Quantitative character variations of cambial derivatives in mangroves and their functional significance

Trees (2001)