Observations of water temperature and salinity in Ongul Strait, Antarctica, in 1998 and investigations of their intraseasonal, seasonal, and interannual variations

• Main Authors: アオキ シゲル, ハシダ ゲン, Shigeru Aoki, Gen Hashida
• Format: Report
• Language: English
• Published: Scientific Paper 2000
• Subjects: Ongul; Antarc*; Antarctica; Polar meteorology and glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2914; http://id.nii.ac.jp/1291/00002914/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2914&item_no=1&attribute_id=18&file_no=1

Water temperature and salinity variations were observed below fast ice in Ongul Strait, Antarctica, in 1998. Vertical profiles of temperature and salinity were obtained with a conductivity-temperature-depth profiler, and temperature and salinity were continuously observed with moored sensors. Intraseasonal variations were observed in both fields. Especially, temperature variation of about 0.05℃ was apparent on the time scale of about one month near the thermocline depth. Seasonal variations of temperature and salinity were similar to those observed in 1982-1983 and 1990-1991. However, the temporally averaged temperature and salinity for 1998 showed differences from those for previous years; temperature was higher in 1998 than in 1982-1983 and 1990-1991 at middle to deep layers, and salinity was intermediate between 1982 (more saline) and 1990-1991 (fresher) throughout the water column.