HOT Physical Oceanography CTD data

Scientists working within the Hawaiian Ocean Time-series (HOT)
project, https://hahana.soest.hawaii.edu/, have been
making repeated observations of the hydrography, chemistry and biology
at a station north of Hawaii since October 1988. The objective of this
research is to provide a comprehensive description of the ocean at a
site representative of the central North Pacific Ocean. Cruises are
made approximately once a month to Station ALOHA, the HOT deep-water
station (22 45'N, 158W) located about 100 km north of Oahu,
Hawaii. Measurements of the thermohaline structure, water column
chemistry, currents, primary production and particle sedimentation
rates are made over a 72-hour period on each cruise.

HOT CTD data are collected using a SeaBird CTD 9-11 (9-11 Plus
with dual sensors as of HOT-54) at the maximum sampling rate
of 24 samples per second (24 Hz). They are screened for errors
and processed to 2-dbar averages. Details of the CTD processing
for each year can be found in HOT Data Reports #1-8 (see the
file Readme.first for information on how to obtain these Data
Reports at).

The files contain pressure, temperature and salinity profiles for all
casts. Some casts also have dissolved oxygen, light transmission,
and fluorescence. The data format consists of a self-documenting
header followed by the data. The data records are written so that
they can be read with a simple FORTRAN read statement. Details of
this format are given in the file Readme.format at
https://hahana.soest.hawaii.edu/hot/dataaccess.html

Data sets for calibrated CTD temperatures and salinities, bottle salinities and
nominally calibrated CTD dissolved oxygens are posted within approximately one
month of each cruise; and calibrated CTD dissolved oxygens, bottle
oxygen and nutrient bottle data within approximately two months of each cruise.

The continuous flow of these data depends on funding, and that depends
in part on the credits that we get from the data users. If
you use these data in your project, please contact Dr. Roger Lukas to
avoid possible duplication of efforts. Please consider the
benefits of possible scientific collaborations in the analysis of
these data. If you use our data in your project, we would appreciate your
acknowledgement of the HOT project.The following NSF grant number
should be cited in publications: OCE-9303094. A preprint and reprint
of the publications utilizing HOT data would be appreciated.