MEASUREMENTS OF CARBON DIOXIDE PARTIAL PRESSURE IN THE AIR AND SURFACE SEA WATER ON BOARD THE ICEBREAKER "SHIRASE"

元データ 国立極地研究所

概要

Continuous measurements of the CO_2 partial pressure in the air and surface sea water were made on board the icebreaker "SHIRASE" between Japan and Antarctica for the periods from November 1987 to April 1988 and from November 1988 to May 1989. The atmospheric CO_2 concentration was high in the mid-northern hemisphere, decreased rapidly southward to a minimum in the mid-southern hemisphere, and increased slightly in the Antarctic region. Irregular variations of the CO_2 concentration were clearly observable, especially in the mid-northern hemisphere, mainly due to alternation and mixing of the continental and maritime air. The CO_2 partial pressure in surface seawater (pCO_2) showed high values in the equatorial region, decreased poleward, and increased again in the Antarctic region. By comparing pCO_2 with the salinity and surface sea temperature measured concurrently, it was found that pCO_2 variations were closely related to upwelling of the deep seawater which is rich in CO_2. The difference of the CO_2 partial pressure between the air and surface seawater (⊿pCO_2) showed negative values in mid-latitudes of both hemispheres and positive values in the equatorial region. This fact implies that the mid-latitude and equatorial oceans act as a sink and source for atmospheric CO_2,respectively. The Antarctic Ocean was generaly a source, but ⊿pCO_2 was highly variable there, due to local ocean conditions.

著者

張 紀久夫 阪大基:福井工大工
Yamanouchi Takashi National Institute of Polar Research
Takata Morimasa National Institute Of Polar Research
Kawaguchi Sadao Nagaoka National College Of Technology
Morimoto S National Institute Of Polar Research Organization Of Information And Systems
Hashida Gen National Institute Of Polar Research
Aoki Shuji Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
KAWAGUCHI Sadao National Institute of Polar Research
AOKI Shuhji National Institute of Polar Research
HASHIDA Gen Upper Atmosphere and Space Research Laboratory, Faculty of Science, Tohoku University
NAKAZAWA Takakiyo Upper Atmosphere and Space Research Laboratory, Faculty of Science, Tohoku University
MURAYAMA Shohei Upper Atmosphere and Space Research Laboratory, Faculty of Science, Tohoku University
TANAKA Masayuki Upper Atmosphere and Space Research Laboratory, Faculty of Science, Tohoku University
Yamanouchi Takashi National Institute For Polar Research
Aoki Shuhji Faculty Of Science Tohoku University
Mae S National Institute Of Polar Research Research Organization Of Information And Systems
Tanaka Masayuki Center For Atmospheric And Oceanic Studies Faculty Of Science Tohoku University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Sci. Tohoku Univ.
Murayama Shohei Upper Atmosphere And Space Research Laboratory Faculty Of Science Tohoku University
Shinbori K Hokkaido Univ. Sapporo
Yamada T Geosystems Inc.
Kawaguchi Sadao Nagoya University
Yamanouchi Takashi National Inst. Of Polar Res. And Dep. Of Polar Sci. The Graduate Univ. For Advanced Studies 10-3 Mid
Yamanouchi Takashi National Institute Of Polar Research 10-3 Midoricho Tachikawa Tokyo Japan.
Tanaka Masayuki Department Of Materials Science And Processing Graduate School Of Engineering Osaka University
Shinbori K Nagaoka National College Of Technology
Yamada Tomomi Geosystems Inc.

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