Arctic Challenge for Sustainability Project

ArCS Blog

ArCS Blog

To predict future climate changes accurately, a better understanding of the climatic and environmental histories are essential. Ice retrieved in glaciers and ice sheets, called ice cores, allows us to reconstruct past climate and environmental condition through analyses of the ice, the impurities and gases preserved in it.

The Japanese Arctic researchers on board RV Mirai is challenging the early winter expedition during November 2018 in the Chukuchi Sea. This is the first trial to enter the Arctic Ocean in this season for this ice-strengthen ship. By using the frequent radiosondes, wave buoys, and daily CTD casts near the marginal ice zone, predictabilities of weather, wave, and sea ice in the Arctic during the period of freezing will be investigated.

I joined the Arctic ocean cruise of CCGS Louis S. St-Laurent (Fig.1) from September 6 to October 2. During the cruise, CTD/Rosette observations, zooplankton net tows, XCTD observations, sea ice observations, and recovery and deployment of moorings and ITP buoys were conducted. Our group sampled seawater for chemical analysis such as total alkalinity (TA) and oxygen isotope ratio of seawater (δ18O), and also recovered a remote access sampler (RAS) that had been deployed at mooring A station (75゜N 150゜W).

An observational cruise in the Arctic Ocean will be conducted during October 24 to December 7, 2018 by using an oceanographic research vessel “MIRAI” (Photo 1) owned by Japan Agency for Marine-Earth Science and Technology (JAMSTEC). We visited Sekinehama port on October 22 and 23 to install a continuous observation system and an air sampling system for measurements of the atmospheric greenhouse gases to the R/V “MIRAI”.

In this ArCS research program, I stayed at Bylot Island and Pond Inlet, located at Nunavut, Canada. Bylot Island is a National Park (Sirmilik national park) which is strictly protected by the Canadian government. To enter this island, we need to take an orientation session for the permission at Parks Canada and arrange the helicopter by our self. This strict management contributes to the maintenance of beautiful natural ecosystems. Pond Inlet is an Inuit village at the north Baffin. Many researchers use this village as a logistics base for research in Bylot during summer.