¥The in situ data are not global and have
problems
¥Satellites drift in orbit and instruments degrade: the data generally do not provide a climate record. They
could.
¥The satellite record is in jeopardy, especially from demanifesting several climate instruments from NPOESS.
¥A baseline transfer standard is essential: in situ super sites (reference radiosonde plus network).
¥Regional climate requires attention to modes of variability and model initialization