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K. Katsumata

@kkats.bsky.social
88 followers 98 following 69 posts

Physical oceanography, pushbike, J. S. Bach, Haskell 🇯🇵 海洋物理・自転車・バッハ・Haskell 作業日誌 researchmap.jp/kkatsumata/研究ブログ

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K. Katsumata @kkats.bsky.social · 12/10/2025
この季節から大学院では修士・博士論文の発表会が続きます。発表準備のポイント 4 点がなかなか良いので参考にどうぞ。 1. 質問を想定して答えを準備しておこう。 2. 発表会は公式行事です。適した服装を。 5. 答えられない質問もあるものと覚悟しておく。「今は分かりません。しかし xxx すれば分かると思います」のような答えで十分なケースも多い。 6. 自分のストレス解消法を知って、発表前・中・あとにそれを実行。 途中の 3. 4. は日本の学生さんにはあまり当てはまらないので省略。本文中にもありますが、審査員は落とそうと思って審査しているのではありません。しっかり準備すれば必ず報われます。
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K. Katsumata @kkats.bsky.social · 25/08/2025
最近出た『科学におけるゴールドスタンダードを復活』とかいう大統領令に対する米国地球物理学連合の出版する各学術誌の編集長の意見が出版されました。Key points の私訳です。 ●この大統領令は米国憲法に違反している。政権の意向に従わない科学出版を検閲し制裁しようとするものだ。 ●この米国の科学界の知見を誤解と歪曲で印象付けようとする文章は、科学と科学者に対する不信をひとびとに植え付けようとする見え透いた試みである。 ●この大統領令が実行されれば、米国の経済・テクノロジー・軍事的国家安全保障の健全性が著しく失われると考えられる。
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K. Katsumata @kkats.bsky.social · 18/08/2025
Expendable Bathythermograph (XBT) is a way to measure upper ocean temperature. For this deployment, we measured sea water temperature down to about 750 m depth. 🌊(video released under CC BY 4.0)
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K. Katsumata @kkats.bsky.social · 11/08/2025
👏"Today’s geoscientist should ... embrace uncertainty in science and cultivate the values of sagacity, bold thinking, and creative adaptability. " rdcu.be/ez8XH
rdcu.be
Serendipity’s role in advancing geoscience
Nature Geoscience - Serendipity has long driven breakthroughs in geoscience. Evolving tools and a changing research landscape are reshaping the conditions for chance discoveries and how...
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K. Katsumata @kkats.bsky.social · 29/05/2025
🌊 We had a cruise for a multidisciplinary ecosystem survey ― whales, birds down to chlorophyll and dissolved oxygen! ― in the eastern Indian sector of the Southern Ocean. : Shared link valid for 50 days ⇒ www.sciencedirect.com/special-issu...
sciencedirect.com
Progress in Oceanography | A multidisciplinary ecosystem survey in the eastern Indian sector of the Southern Ocean (80?150°E) during 2018/19 season by the Japanese survey vessel, Kaiyo-maru | ScienceD...
The large-scale multidisciplinary ecosystem survey in the eastern Indian sector (80-150°E) of the Southern Ocean was conducted by the Japanese research vessel, Kaiyo-maru, during the 2018-2019 austral...
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Reposted by K. Katsumata
Ryohei Yamaguchi @ryamaguchi.bsky.social · 05/05/2025
At the last CTD station, a rainbow celebrated the end of our long journey! #GO_SHIP #P04W 🌊
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K. Katsumata @kkats.bsky.social · 14/02/2025
forgot 🌊
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K. Katsumata @kkats.bsky.social · 14/02/2025
[Q] When you write "Pacific and Indian oceans", do you capitalize "o" as in "Oceans"? In a well-known paper (doi.org/10.1038/3791...) it is not. I have looked at style guides in several oceanography journals but could not find an explicit statement. 🤔
doi.org
Pathways of water between the Pacific and Indian oceans in the Indonesian seas - Nature
Nature - Pathways of water between the Pacific and Indian oceans in the Indonesian seas
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K. Katsumata @kkats.bsky.social · 12/02/2025
New paper ― results from the 2019/20 #GO-SHIP cruise in the Indian Ocean sector of the Southern Ocean. Updates on the #ACC fronts, deep circulation and mixing in the Weddell-Enderby basin!
doi.org
Hydrographic section along 55° E in the Indian and Southern oceans
Abstract. A hydrographic section along 55° E, south of 30° S, was visited from December 2019 to January 2020 as the first occupation under the Global Ocean Ship-based Hydrographic Investigations Progr...
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K. Katsumata @kkats.bsky.social · 01/01/2025
We pray the Lord of peace will give you peace in 2025 and in every way.
 Resurrection Cathedral in Tokyo, 1 January 2025
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K. Katsumata @kkats.bsky.social · 21/12/2024
13 bike films -- funny, encouraging, and philosophical.🚲
A banner with a logo "BICYCLE FILM FESTIVAL in ONOMICHI"
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K. Katsumata @kkats.bsky.social · 20/12/2024
Bromptons! #BromptonRide
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K. Katsumata @kkats.bsky.social · 26/11/2024
最近の Microsoft Office は書いたものを教材として AI に流し込んでるそうです。日本語版では以下で回避。ファイル→オプション→トラストセンター→[トラストセンターの設定]→プライバシーオプション→プライバシー設定、まで行って「オプションの接続エクスペリエンス」の✔️を外して OK して再起動。
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Reposted by K. Katsumata
Shane Elipot @selipot.bsky.social · 07/09/2024
In the end, the Gulf Stream is *not* slowing down and the #AMOC ... just marginally. That's fascinating and relevant for climate modeling and the current and future needs for ocean observing! www.nature.com/articles/s41...
nature.com
Florida Current transport observations reveal four decades of steady state - Nature Communications
The study shows that the Florida Current, an important contributor to the Atlantic Meridional Overturning Circulation, has not declined as previously suggested, but remained steady over the past 40-ye...
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K. Katsumata @kkats.bsky.social · 13/10/2024
学生の時に知っておきたかった。 Wish I knew this when I was student
blogs.lse.ac.uk
How to design an award-winning conference poster
A good academic conference poster serves a dual purpose: it is both an effective networking tool and a means by which to articulately communicate your research. But many academics fail to produce a…
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K. Katsumata @kkats.bsky.social · 09/09/2024
Physical Oceanography Field Trip 🌊 where students drop expendable bathythermograph (XBT) to measure ocean temperature and to estimate the Kuroshio transport. 海洋学実習 🌊 では投棄式水温計で実際に海洋の水温を測り、黒潮の流量を推定します。よくみるとランチャーから飛び出したセンサーが見えます。
A student dropping a temperature sensor from the deck of a ferry into the blue ocean.
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K. Katsumata @kkats.bsky.social · 22/08/2024
#GO-SHIP uses research vessels to collect 'climate quality' global ocean section data ― land-to-land, surface-to-bottom ― temperature, salinity, oxygen, nutrients, carbons, CFCs, etc. The data are now formatted and gridded and easy to use for newbies and experts 🌊 doi.org/10.7942/GOSH...
doi.org
GO-SHIP Easy Ocean: Formatted and gridded ship-based hydrographic section data
GO-SHIP (The Global Ocean Ship-based Hydrographic Investigations Program) has developed the protocols and methods to generate a data product that concatenates all occupations of individual sections in...
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K. Katsumata @kkats.bsky.social · 19/08/2024
海洋表層にアルカリをまくと大気中の二酸化炭素がより多く海に溶け込む道理。来年夏に米国で実験予定。写真は昨年の実験から。
dx.doi.org
Will regulators OK controversial effort to supercharge ocean’s ability to absorb carbon?
Geoengineering study that would disperse alkaline chemicals off Cape Cod draws environmental opposition
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K. Katsumata @kkats.bsky.social · 19/08/2024
明日は大学院入試です。皆さんの実力が出せますように。 Entrance exam for Graduate School tomorrow. Good luck.
Signboard saying Graduate Entrance Examination
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K. Katsumata @kkats.bsky.social · 05/08/2024
理学部ってこんなところです。理学に興味のある中学生高校生のかたにご紹介ください。
s.u-tokyo.ac.jp
オープンキャンパス2024 | 東京大学理学部
東京大学理学部オープンキャンパス2024 - 東京大学理学部の魅力をオンラインにてお伝えします。
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K. Katsumata @kkats.bsky.social · 11/06/2024
正論ではあるのだけれど Encouraging, but...
A book "The Usefulness of Useless Knowledge" by Flexner & Dijkraff
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K. Katsumata @kkats.bsky.social · 21/05/2024
Got a stimulating question after a Physical Oceanogr. class 😄 海洋物理の授業のあと、非常に本質的な質問を受ける喜び。
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K. Katsumata @kkats.bsky.social · 11/05/2024
青木湖と北アルプス Blue lake Aokiko with Japan Alps
Lake. Snow covered mountains on the far side.
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K. Katsumata @kkats.bsky.social · 05/05/2024
Blue sky, blue sea from Oyashirazu
Ocean view from pebble beach
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K. Katsumata @kkats.bsky.social · 03/05/2024
右がぜんまい 左がこごみ Wild veges in Nagano
Green mountain vegetables
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K. Katsumata @kkats.bsky.social · 25/04/2024
初めて見た。柏の葉キャンパス駅にて。 First time to see a cake vending machine. At Kashiwanoha Campus station.
不二家ケーキスタンド
A vending machine with a label "Fujiya Cake's stand"
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K. Katsumata @kkats.bsky.social · 25/04/2024
東京大学大気海洋研究所気候システム系 U. Tokyo Atoms Ocean Research Institute, Div. Climate System Res.
コンクリート打放しのビルから遠く新緑望む
Modern building with fresh green leaves far
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K. Katsumata @kkats.bsky.social · 24/04/2024
グリーナウェイ三本目 Yet another P. Greenaway & M. Nyman
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K. Katsumata @kkats.bsky.social · 30/03/2024
Wasabi farm, one of www.fao.org/giahs/en/ 伊豆は筏場のわさび田
Wasabi farm
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K. Katsumata @kkats.bsky.social · 23/03/2024
学生の時大好きだったナイマン+グリーナウェイ Nyman + Greenaway -- one of my favourites!
Poster outside of a cinema
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Reposted by K. Katsumata
Patrick Rafter @oceanandclimate.bsky.social · 06/03/2024
For the oceanographers, a new WOA is out! The first since 2018. www.ncei.noaa.gov/news/World-O...
ncei.noaa.gov
World Ocean Atlas 2023
The Ocean Climate Laboratory released World Ocean Atlas 2023—Global Climatologies of Temperature, Salinity, Dissolved Oxygen, and Inorganic Nutrients.
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K. Katsumata @kkats.bsky.social · 28/02/2024
「音色」でここちよい「音程」が影響をうけるというのは武満リスナーなら納得の結果。 Listeners of Takemitsu music would all agree with this "timbral effects on musical consonance"
doi.org
Timbral effects on consonance disentangle psychoacoustic mechanisms and suggest perceptual origins for musical scales - Nature Communications
Consonance is crucial to diverse musical styles and is traditionally attributed to simple frequency ratios between tones. Here, the authors show timbral effects on consonance that challenge this view ...
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K. Katsumata @kkats.bsky.social · 23/02/2024
Bluesky in New Orleans
CBD, New Orleans LA
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K. Katsumata @kkats.bsky.social · 16/02/2024
税金で取得したデータは(時間かかっても)公開するべき。
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K. Katsumata @kkats.bsky.social · 14/02/2024
渦による運動量輸送は ACC の「維持」に重要というのは知られていたが「生成」は別問題だよね、とおもっていたら答えが出たらしい。最初に「蹴り」が入っていた、と。 We know eddies transfer momentum to "maintain" ACC but "generation" is different -- now there is an answer. Wind and density "established" ACC some tens of millions years ago.
doi.org
Late Miocene onset of the modern Antarctic Circumpolar Current - Nature Geoscience
Ocean sediment records suggest that the modern Antarctic Circumpolar Current did not exist before the late Miocene cooling, indicating its origin is linked to the expansion of the Antarctic Ice Sheet.
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K. Katsumata @kkats.bsky.social · 09/02/2024
こないだ買ったCDに小澤さんのプーランクが入っていた。思えばバルトーク沼にハマったのは小澤さんボストンのオケコンと弦チェレ。 Just realised the CD I bought last week has Ozawa's "Le Bal Masque" by Poulenc. Ozawa & Boston opened the gate to the Bartok world. Rest in Peace.
CD jacket of "Les Mamelles de Tiaresias" and "Le bal masque"  by Poulenc
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K. Katsumata @kkats.bsky.social · 03/02/2024
こんな分かりやすい一里塚初めて見た。甲州街道恋塚。 A mile mound by Koshu Kaido Way, Koizuka
高さ3メートル位の丘
A 3m high mound by the road
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K. Katsumata @kkats.bsky.social · 30/01/2024
いろいろ聞いて平均律はポリーニとヴィエルで決まりだと思うが、耳から離れないのは Switched on Bach だったりする。 When it comes to Bach's s Well-Tempered, Pollini & Vieru are my answer, but I cannot get rid of Switched On Bach from my ear.
Two sets of CDs
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K. Katsumata @kkats.bsky.social · 17/01/2024
電車通勤でこういう本が読めるのは嬉しい。 Joy to read such books on commuting train
Coffee House -- city life in 18th century London by A. Kobayashi
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K. Katsumata @kkats.bsky.social · 28/12/2023
Mt. Fuji from Wada Pass 和田峠から富士
Mt. Fuji
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K. Katsumata @kkats.bsky.social · 22/12/2023
Jupiter and the moon 2 degrees apart
Tiny white dot near a larger bright circle
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K. Katsumata @kkats.bsky.social · 07/12/2023
Found another Aussie-grown physical oceanographer -- G. T. Csanady この人も豪州で学んでたとは知らなんだ。
Shot of a printed biography of G. T. Csabady
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K. Katsumata @kkats.bsky.social · 30/11/2023
Faculty of Science, University of Tokyo
Eleven story building
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K. Katsumata @kkats.bsky.social · 29/11/2023
Research Institute for Global Change, JAMSTEC
White 4 story  building
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K. Katsumata @kkats.bsky.social · 22/11/2023
「色んな理由で酒を飲まない人がいます。別に理由は説明しなくていいですよね。ただ飲まないで参加するのもアリと認めてください。」
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K. Katsumata @kkats.bsky.social · 22/11/2023
Joyful departure by Ralph Towner -- the piece to listen to in the airport lobby. m.youtube.com/watch?v=yVBB...
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K. Katsumata @kkats.bsky.social · 21/11/2023
Institute of Low Temperature Science, Hokkaido Uni.
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K. Katsumata @kkats.bsky.social · 18/11/2023
I have just realized today that I have long misread this paper since the late 90s (cannot find its DOI). 初めて読んだ 90 年以来この論文を誤読していたことを今日発見。🥶 Bryden & Stommel, 1984, Limiting processes that determine basic features of the Mediterranean Sea, Oceanologica Acta, 7.
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K. Katsumata @kkats.bsky.social · 15/11/2023
Tipping point theory ... can it be applied to Kuroshio Meander? 黒潮大蛇行もこれで説明出来るか? doi.org/10.1029/2023...
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