Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005...
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Transcript of Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005...
![Page 1: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/1.jpg)
Young-Jin Kim
Young-Jin Kim
Earth’s Largest Icebergs Meeting
OSU, Byrd PolarMay 8th, 2005
Observing the dynamic drift of giant tabular icebergs
![Page 2: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/2.jpg)
Young-Jin Kim
What are we interested in…
• Iceberg tracking• Iceberg calving and
disintegration• Iceberg sea-ice
interaction• Seismic tremor due
to icebergs• Iceberg impact on
marine habitats
![Page 3: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/3.jpg)
Young-Jin Kim
What we have done to date…• Autonomous drift stations
(position and meteorological data)
• Seismometer array(iceberg tremor)
• Snow depth thermistor array(surface melting)
• Radar ice thickness sounder(iceberg melting)
• Remotely controlled webcam(ice melange, habitat impact)
![Page 4: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/4.jpg)
Young-Jin Kim
North
![Page 5: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/5.jpg)
Young-Jin Kim
![Page 6: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/6.jpg)
Young-Jin Kim
![Page 7: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/7.jpg)
Young-Jin Kim
![Page 8: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/8.jpg)
Young-Jin Kim
![Page 9: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/9.jpg)
Young-Jin Kim
Data stream transmission
• ARGOS system is not always reliable• Transmission interval is 20 minutes• Stack of 3 messages (for each attempt)
that includes current time TN , TN – 1 , TN – 2
![Page 10: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/10.jpg)
Young-Jin Kim
Data contamination and loss
• Many data outliers (15% of total dataset) – solely due to ARGOS transmission errors
• Many data duplicates (20% of total dataset)– due to 3 message stack rebroadcast
• Many missing data points (30% of measured)– due to missed uplinks to ARGOS
![Page 11: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/11.jpg)
Young-Jin Kim
![Page 12: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/12.jpg)
Young-Jin Kim
![Page 13: Young-Jin Kim Young-Jin Kim Earth’s Largest Icebergs Meeting OSU, Byrd Polar May 8 th, 2005 Observing the dynamic drift of giant tabular icebergs.](https://reader035.fdocuments.net/reader035/viewer/2022062503/5a4d1b0d7f8b9ab05998c976/html5/thumbnails/13.jpg)
Young-Jin Kim
What’s next?
• Improving ARGOS transmission protocol– Further analysis of data transmission density– Design of intelligent rebroadcast stack to
optimize for bridging satellite orbit gaps e.g. use an adaptive one: TN , TN – 7 , TN – 19
• Better filtering and data processing• Inverse model to explain dynamic drift• Making the data available in general
purpose format (most likely in netCDF)