Deep Argo pilot data enters the Argo data stream

As part of pilot deployments, Argo profiles reaching below 2000dbar will start appearing in the Argo data system. The accuracy of the data below 2000dbar is not yet well understood and so Argo is currently labelling these data with lower quality flags (2 and 3) in real time. We warn users to treat these data with care and recognize that we … Read More

Advice on pressure biases in the Argo data set

A part of the global Argo data are subject to biases in reported pressures. These biases are usually less than 5db, but occasionally can be larger (> 20db). These bias errors are being steadily removed by the reprocessing of historical Argo data. We expect that by the end of 2010 these errors will be removed from the global Argo data … Read More

Important notice to Argo users (pressure drift in APEX floats)

Users are cautioned that (i) Most Argo Data Assembly Centers (DACs) have not yet corrected APEX profile data for the drift of pressure sensors in real-time (RT) and delayed-mode (DM) files. Steps are being taken by the DACs to apply drift corrections in both RT and DM files. It is estimated the correction will change affected APEX float pressures by … Read More

2nd Important notice to Argo users pressure offset errors

This is to provide an update to the earlier notice (see previous notice), with regard to progress in correcting pressure offset errors. Pressure offset errors in WHOI/FSI Argo float profiles include a subset (a) that can be corrected exactly using automated procedures and a subset (b) that requires expert examination to produce an approximate correction. Profiles in subset (a) have now … Read More

Important notice to Argo users about pressure offset errors

It has just been learned that Argo profiles from SOLO floats with FSI CTD (Argo Program WHOI) may have incorrect pressure values. Profile data may be offset upward by one or more pressure levels, resulting in a significant cold bias for these instruments. Problematic floats are mostly in the Atlantic Ocean (198 out of the 211 presently active FSI SOLO instruments). The … Read More