Report on 1999 Arctic Cruise of R/V Mirai (MR99-K05)
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On the basis of observations and theoretical considerations, we have come to realize that the Arctic region may play an important role in forming and maintaining global climate change. Also the North Pacific subarctic area is considered to be a key area with decadal climate change. The purposes of this cruise are as follows; Leg.1 (North Pacific Ocean):a. to observe physical/chemical properties from central to eastern part of the subarctic gyre along 47N in order to clarify the change of properties by comparing with the results in 1985. b. to measure trace gases and aerosols in the oceanic atmosphere in order to clarify these distribution and behaviors in the Arctic regions. Leg.2 (Arctic Ocean): a. to observe the physical/chemical/biological properties in the Beaufort, Chukchi, and Bering Seas in order to clarify distributions and behaviors of these properties and investigate the Arctic Change and its role on the global climate system. b.to clarify distributions of various kinds of volatile organic compounds (VOCs) in the Arctic atmosphere, the Arctic Ocean, and the Arctic ice. c.to investigate the radar-echo and dynamic structure of storms developed over the Beaufort, Chukchi, and Bering Seas. d.to measure trace gases and aerosols in the oceanic atmosphere in order to clarify these distribution and behaviors in the Arctic regions. e.to collect sediment samples from sea-floor in the Arctic Ocean and the Bering Sea in order to search for records of the Arctic past history and clarify its changing climate in the sediment. |
| Leg.1: North Pacific Ocean | From August 23rd, 1999 (Sekinehama, JAPAN) |
| to September 10th, 1999 (Dutch Harbor, USA) | |
| Leg.2: Arctic Ocean | From September 11th, 1999 (Dutch Harbor, USA) |
| to October 6th, 1999 (Sekinehama, JAPAN) |
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| Figure 1: Whole cruise track of MR99-K05 | Figure 2: Cruise track of MR99-K05 in the Arctic Ocean |
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| Figure 3: CTD stations for MR99-K05, Leg.2 | Figure 4: Tempreture and Salinity section(0 - 300m) along the Beaufort shelf break (Stn.17 - 43) | Figure 5: Tempreture and Salinity section(0 - 600m) along the Beaufort shelf break (Stn.17 - 43) |
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| Figure 6 | Figure 7 | Figure 8 | Figure 9 |
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