muso wrote on Nov 20^th, 2013 at 7:55pm:


actually the word "ego" is a Greek word - it means "I" or the sensation/awareness of SELF in psychology.

We all have an ego apparently - nothing to be ashamed of

You're not that you have an ego are you muso?

Chimp_Logic wrote on Nov 20^th, 2013 at 8:24pm:


LOL. We all have moderately inflated egos.  I had that partial pressure card ready to play, but I wanted to see if you picked up on it first.

You do understand that freeze drying is possible at atmospheric pressure now, I take it?

'A new paper on Arctic Ice-
'Abstract. Understanding recent Arctic climate change requires detailed information on past changes, in particular on a regional scale. The extension of the depth–age relation of the Akademii Nauk (AN) ice core from Severnaya Zemlya (SZ) to the last 1100 yr provides new perspectives on past climate fluctuations in the Barents and Kara seas region. Here, we present the easternmost high-resolution ice-core climate proxy records (δ18O and sodium) from the Arctic. Multi-annual AN δ18O data as near-surface air-temperature proxies reveal major temperature changes over the last millennium, including the absolute minimum around 1800 and the unprecedented warming to a double-peak maximum in the early 20th century. The long-term cooling trend in δ18O is related to a decline in summer insolation but also to the growth of the AN ice cap as indicated by decreasing sodium concentrations. Neither a pronounced Medieval Climate Anomaly nor a Little Ice Age are detectable in the AN δ18O record. In contrast, there is evidence of several abrupt warming and cooling events, such as in the 15th and 16th centuries, partly accompanied by corresponding changes in sodium concentrations. These abrupt changes are assumed to be related to sea-ice cover variability in the Barents and Kara seas region, which might be caused by shifts in atmospheric circulation patterns. Our results indicate a significant impact of internal climate variability on Arctic climate change in the last millennium.

Clim-past. net   /9/2379/2013/cp-9-2379-2013.html

Another not a denialist site.

Chimp_Logic wrote on Nov 20^th, 2013 at 9:58pm:


Generally it's at reduced pressure, however sublimation (as opposed to evaporation) can take place as long as the partial pressure of water in the gas phase does not exceed 608 Pa (4.56 Torr) although if you want to avoid liquid water, you'd tend to aim for a much lower partial pressure than that.

This can occur at normal atmospheric pressure. In laboratory scale freeze driers such as I've used (many years ago), this is not practical. As moisture is extracted from the preparation, it will tend to increase the partial pressure above the triple point. We used to use a vacuum pump plus  a dessicant such as magnesium perchlorate (ouch). It's also an endothermic process. To achieve optimal control, the substance needs to be given time to absorb energy from the environment, or it will just keep getting colder. 

Now what's your point? Are you going on about the use of "subliminate" as opposed to sublimate? Or is it something less trivial than that?

Chimp_Logic

Clim-past. net   /9/2379/2013/cp-9-2379-2013.html

If you complete the link with the w's, take out the spaces you should find it.

What point are you making , Lee?

Chimp - I'm rapidly getting bored with this. You are the one who was saying that sublimation is not possible at atmospheric pressure. Now you're creating a smoke screen because your inflated simian ego is not allowed to be wrong.