The International Surface Pressure Databank (ISPD) 1755-2010: contains surface and sea level pressure observations from three components: land (largely from ISD and also 43 other national and international collections of pressure observations), marine (largely from ICOADS), and tropical cyclone pressure reports from IBTrACS.
Gridded fields for Surface and Sea Level Pressure can be obtained from Atmospheric Reanalysis Datasets.
Compositing map tools for several global and near-global gridded Sea Level Pressure data sets are available at the GCOS Working Group on Surface Pressure website.
I'll change the link now so…
I'll change the link now so it goes to the correct location.
Link broken for Atmospheric Reanalysis Datasets
It appears the link on this page for access to gridded fields of surface and sea level pressure is broken. Where can those reanalysis datasets be located?