Main contents


☆主なコンテンツ
1、新着論文 2、論文概説 3、コラム 4、本のレビュー 5、雑記(PC・研究関連)
6、気になった一文集(日本語English) 7、日記(日本語English

2016年2月25日木曜日

過去の風の変動を復元する(Jacobel et al., 2016, Ncom)

Large deglacial shifts of the Pacific Intertropical Convergence Zone
A.W. Jacobel, J.F. McManus, R.F. Anderson & G. Winckler
Nature Communications 7:10449, DOI: 10.1038/ncomms10449 (2016)
より。

赤道太平洋から得られた堆積物コアからダスト量を復元し、1つ前の退氷期のハインリッヒ・イベント(HS11)における熱帯収束帯の変動を議論。

2016年2月20日土曜日

To the next coring site

We finished describing all cores recovered from the first site, Natal Valley. We are now preparing for site reports. Presentation of all sub-group finished yesterday.

The ship are heading south for the second site, Agluhas Plateau, which is the southernmost site of this expedition.

We hope continuous pelagic sediment are recovered from the next site, which will change periodically between subtropical (e.g., forams and cocoliths) and subpolar lithologies (e.g., diatoms).
It means sedimentologist group will be very busy describing cores.

--------

I go to the gym at least once every two days. My favorites are running machine and weight lifting.

Sometimes I keep my dinner wrapped, and ate them after training.

At the moment , I keep my body style.

2016年2月14日日曜日

The first core

Yesterday, we finished drilling sediment cores at the first core site, Natal Valley.

It was so exciting to see how the drilling device are combined and how coring operation are conducted.

The lithology of the core looks similar to all depth (about 300 m were drilled with almost 100% recovery), so descriptions of the core and smear slide observation is quite simple. Foraminifer shells, that I hope to obtain, are abundant in the sediment, but core disturbances are severe.

Now we are drilling the second core in the same site. As there is no large changes in lithology, it is dull to describe all cores again!

But this procedure is important because both end of cores (upper and lower parts) are generally destroyed and we must splice it with the adjacent cores (Hole B, C etc.).


It takes long time for my body to adopt to irregular rhythm of life in the ship (wake up at 23:00 and sleep at 15:00).

I can not sleep well in the bed although I go to gym every two days for running and training my muscle.

Food in the ship is so nice that I can hardly become fed up with.


We will stay at this site in at least 5 days. We are looking for something interesting and stimulating!

Smear Slide Observation


Sediment core description

2016年2月8日月曜日

氷期の大気中CO2濃度、生物生産、鉄の関わり(Costa et al., Jaccord et al., 2016, Nature)

No iron fertilization in the equatorial Pacific Ocean during the last ice age
K. M. Costa, J. F. McManus, R. F. Anderson, H. Ren, D. M. Sigman, G. Winckler, M. Q. Fleisher, F. Marcantonio & A. C. Ravelo
Nature 529, 519–522 (28 January 2016)

Covariation of deep Southern Ocean oxygenation and atmospheric CO2 through the last ice age
Samuel L. Jaccard, Eric D. Galbraith, Alfredo Martínez-García & Robert F. Anderson
Nature (2016) doi:10.1038/nature16514

より。
ともに氷期における大気中CO2濃度低下の謎について堆積物中の古気候指標から考察した論文。
JOIDES Resolution@インド洋南西部の甲板より。視線の先にJaccordらが得た堆積物の採取地が


2016年2月6日土曜日

From South of Madagascar

Now we are heading for first core site, Natal Valley. We revised the drilling plan because of some diplomatic issue.
There are often piracy in the north of Madagascar Island, thus we are now going in the southern course.

Currently we are discussing how to describe the splitted core, how to handle them, and how to write the report.

It is two days left until we arrive at the first core site. We must make ourselves fitted to day/night shift until the arrival. I'm in a night shift, so I will wake up in the mid-night and go to bed in the afternoon.

I have a really good friendship with members of this expedition, and enjoy a conversation with them so much! We are the family because we will spend dense two months together and our relationship will last for a couple of decades after this expedition, too.
JOIDES Resolution

A sign we found in the town of Port Louis!

Safety emergency drill

A magnificent sunset seen from the JR

A beautiful rainbow when we leave the port

A tag boat pull the JR during the departure

2016年2月2日火曜日

International community

I've got on board the US drilling ship JOIDES Resolution that is staying in Port Louis.

The inside of the ship is so clean and faculty members and staffs are very kind.

I really enjoy the meals here, and sometimes go to restaurant in waterfront area.

Scientific party is very international, and people come from US, Japan, Germany, UK, France, Australia, Brazil, China, and so on. My room mate is French.
I enjoy talking with new international friends, although I don't remember their names yet. The contents of the talk are mainly on science and culture of our own countries.

No one can properly pronounce/remember either Kaoru or Kubota, thus I will tell them "Just call me K".

Dr. K. 

It's a good name because there is a famous character in Japanese comic named Dr. K.
By the way, KUBOTA is popular in Japan owing to famous agricultural company and sake.

We share the cabin by two people in the ship, because a working shift is separated by day/night.
My shit is decided to be night shift. I will work from 0:00 to 12:00 every day. Thus I planed my life schedule as follows,

23:00 wake up

23:20 breakfast

0:00 the shift start

6:00 lunch

12:00 the shift end

12:20 dinner

13:00 training at gym

15:00 go to bed

It is very funny schedule. But considering a jet lug between here and Japan, it is very regular.
Thus, I may not suffer from the jet lug so much after I come back to Japan.