8-23-05: Coring is a muddy and wet business. |
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8-23-05: Coring is a muddy and wet business. |
Ute_Kaden |
Aug 24 2005, 12:00 AM
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#1
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TREC Teacher Group: TREC Team Posts: 203 Joined: 27-April 05 Member No.: 10 |
Coring is a muddy and wet business.
TREC 8-23-05 map for 8-22-05 We are going North Ship Position Information at 2005/08/23 22:17:01 UTC Longitude: 178 8.481 W Latitude: 81 57.193 N I just got up (11:00 am) after a long night helping with coring. Remember, night means just the time on the watch (Alaskan time). We have daylight for 24 h. Yesterday, 8-22-05, we had reached station 7 and retrieved a JPC and a multi core filled with sediments from the ocean floor. The JPC (Jumbo Piston Core) had a length of 15 m. This gives the scientist sediments that got deposited thousands of years ago. Coring went on until 3:30 am today. The temperature had dropped significantly to about – 4C and cold wind was blowing in our faces. New Grease and Nila ice was forming in the ocean. Other activities included fixing the seismic gear and protecting the sensitive steamer from the heavier ice we see. Martin and Dale preparing the JPC. It is cold! Hans and his team patch the seismic gear (very sensative equipment) to make it withstand the heavier ice impact. Nila and grease ice form on the ocean, an indication that it is getting colder. Ice conditions 8-22-05 Coring is a muddy and wet business. You can see that the metal surface of the core cover freezes over. The JPC is obtained by a gravity drop. The most recent sediments on top of the ocean floor are destroyed by this method. To get reliable information about the recent deposits a multi core is obtained. You can see the instrumentation of the multi core in the photo. It looks like a space craft. 7 PVC tubes get lowered gently to the ocean floor. JPC covered with ice. Ute + Multicore Multicore gets lowered to the ocean floor. Multi core filed with mud (sediments) is retrieved from the ocean floor 1859 m below the sea surface. Yesterday’s depth was about 1850 m down. When the multicore is retrieved the tubes are filled with about 47 cm of recent sediments. Both the JPC and the multicore in combination will give the researchers a good idea about the history of climate changes in the Artic. Ruben wrote a journal entry so you can learn more bout coring. Best regards, Ute |
Carol Lee Lutsinger |
Aug 24 2005, 05:24 AM
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#2
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Unregistered |
QUOTE(Ute_Kaden @ Aug 24 2005, 12:00 AM) Coring is a muddy and wet business. TREC 8-23-05 map for 8-22-05 We are going North Ship Position Information at 2005/08/23 22:17:01 UTC Longitude: 178 8.481 W Latitude: 81 57.193 N I just got up (11:00 am) after a long night helping with coring. Remember, night means just the time on the watch (Alaskan time). We have daylight for 24 h. Yesterday, 8-22-05, we had reached station 7 and retrieved a JPC and a multi core filled with sediments from the ocean floor. The JPC (Jumbo Piston Core) had a length of 15 m. This gives the scientist sediments that got deposited thousands of years ago. Coring went on until 3:30 am today. The temperature had dropped significantly to about – 4C and cold wind was blowing in our faces. New Grease and Nila ice was forming in the ocean. Other activities included fixing the seismic gear and protecting the sensitive steamer from the heavier ice we see. Martin and Dale preparing the JPC. It is cold! Hans and his team patch the seismic gear (very sensative equipment) to make it withstand the heavier ice impact. Nila and grease ice form on the ocean, an indication that it is getting colder. Ice conditions 8-22-05 Coring is a muddy and wet business. You can see that the metal surface of the core cover freezes over. The JPC is obtained by a gravity drop. The most recent sediments on top of the ocean floor are destroyed by this method. To get reliable information about the recent deposits a multi core is obtained. You can see the instrumentation of the multi core in the photo. It looks like a space craft. 7 PVC tubes get lowered gently to the ocean floor. Multi core filed with mud (sediments) is retrieved from the ocean floor 1859 m below the sea surface. Yesterday’s depth was about 1850 m down. When the multicore is retrieved the tubes are filled with about 47 cm of recent sediments. Both the JPC and the multicore in combination will give the researchers a good idea about the history of climate changes in the Artic. Ruben wrote a journal entry so you can learn more bout coring. Best regards, Ute |
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