Station upgrades: CMRC3 was outfitted with an additional in water Biospherical radiometer. Also, the above water radiometer was replaced and the second in water CTD was reinstalled. Finally, we moved the GPS antenna outside the case to improve GPS acquisition times. We think that shorter times may be necessary to prevent lost transmissions through GOES. So far, all instruments are reporting and we have no dropped transmissions.
Coral bleaching: We observed mild paling to full bleaching of select species of corals around the station and at neighboring N. Normans Reef. The Siderastrea siderea colonies had paling on sunlit surfaces and in blotched patterns. Agaricia sp. showed severe bleaching on some colonies, others - including the set that we are monitoring, looked unaffected. I saw no pattern to this.
Structural observations: The station had slightly more growth on it than we are accustomed to seeing but overall still appeared very clean. The BIC sensor head was perfectly clean. The PAM heads had slight algal growth covering them - this material was very easy to remove but did require pulling the PAM heads up into their mounts, cleaning, then repositioning. The worst growth was observed on the pCO2 instrument but did not appear to be affecting the inlet or outlets so we left it untouched.
Other observations: The usual suspects were observed near the stick: barracuda, a stingray, yellow rays.
This site is for providing CMRC3 ICON/CREWS field maintenance records for NOAA/AOML/ICON data management purposes. Please update this blog whenever new operations are performed in the field, so that AOML can coordinate their efforts with the CMRC ICON/CREWS field efforts.
Thursday, August 25, 2005
Thursday, August 11, 2005
PAM head update
Hi Jim: Went out to the CREWS stick yesterday. It's all there. I cleaned the PAM heads and took several readings on the Siderastrea and Agaricia colony at noon. I have the following results for you to compare. For Sideratrea siderea the average quantum yield was 0.333 and for Agaricia tenuifolia it was 0.466. The PAM heads for the agaricid are definitely in a more shaded part of the colony. Taking PAM measurements on the opposite, sun exposed, side showed much lower quantum yields. Let me know how this compares.
Cheers, Michael
Dr. Michael P. Lesser
Department of Zoology and Center for Marine Biology
University of New Hampshire
Durham, NH 03824
603-862-3442
603-862-3784
Cheers, Michael
Dr. Michael P. Lesser
Department of Zoology and Center for Marine Biology
University of New Hampshire
Durham, NH 03824
603-862-3442
603-862-3784
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