Long-term temperature measurements using miniaturized temperature loggers (MTLs) were performed in Ocean Drilling Program Holes 1253A and 1255A across the Middle America Trench off the Nicoya Peninsula, Costa Rica. All three recovered loggers, which were retrieved fully functional, provided high-resolution temperature records. These records cover a time span of ~2 yr and were sampled at an interval of 17 min. There are a number of signals in the temperature data that are most likely caused by hydrologic events. These events are also present in the pressure data recorded by Circulation Obviation Retrofit Kit (CORK)-IIs that are installed in these boreholes. Moreover, the temperature data are important input parameters for calculating pumping rates of the OsmoSamplers, within which the MTLs were integrated. Therefore, the MTL temperature records combined with the CORK-II pressure measurements and the data from the OsmoSampler fluid samples allow the investigation of subduction zone hydrologic processes.
1Heesemann, M., Villinger, H., Jannasch, H.W., Kastner, M., and the Expedition 301T Scientists, 2006. Data report: Long-term temperature measurements in Holes 1253A and 1255A off Costa Rica, ODP Leg 205. In Morris, J.D., Villinger, H.W., and Klaus, A. (Eds.), Proc. ODP, Sci. Results, 205 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/205_SR/209/209.htm>. [Cited YYYY-MM-DD]
2Universität Bremen, Department of Geoscience, Klagenfurter Strasse, 28359 Bremen, Germany. heesema@uni-bremen.de
3Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing CA 95039, USA.
4Scripps Institution of Oceanography, University of California, San Diego, Geoscience Research Division, 8615 Discovery Way, La Jolla CA 92093-0212, USA.
Initial receipt: 21 March 2005
Acceptance: 9 August 2005
Web publication: 31 March 2006
Ms 205SR-209