tag:blogger.com,1999:blog-9959776.post1406241683480576282..comments2024-02-15T04:42:41.606+00:00Comments on James' Empty Blog: BlueSkiesResearch.org.uk: EGU 2022 – how cold was the LGM (again)?James Annanhttp://www.blogger.com/profile/04318741813895533700noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-9959776.post-5390075237832727922022-09-23T08:42:03.031+01:002022-09-23T08:42:03.031+01:00Sadly yes I'm vaguely aware of it. If you want...Sadly yes I'm vaguely aware of it. If you want to read and provide a summary, have fun :-)James Annanhttps://www.blogger.com/profile/04318741813895533700noreply@blogger.comtag:blogger.com,1999:blog-9959776.post-42373064506172657952022-09-21T02:08:54.544+01:002022-09-21T02:08:54.544+01:00JA,
You know this I am sure ...
Objectively comb...JA,<br /><br />You know this I am sure ... <br />Objectively combining climate sensitivity evidence<br />Nicholas Lewis<br /><br />Critiquing Sherwood, et. al. (2020).<br /><br />I will patiently await anything you all have to say in response.<br /><br />Thanks in advance.Everett F Sargenthttps://www.blogger.com/profile/00201577558036010680noreply@blogger.comtag:blogger.com,1999:blog-9959776.post-87778677848978924112022-08-25T17:14:58.851+01:002022-08-25T17:14:58.851+01:00The baseline is basically "pre-industrial&quo...The baseline is basically "pre-industrial" in both cases and the definition is a little bit imprecise and variable between authors, but if you think of 1850-1900 you won't be far wrong. Tierney et al actually used the top of their cores (and called it "Late Holocene" rather than "pre-industrial"), and the date for these won't be the same for all data points, it depends what is retrieved and analysed. However, we actually tried a few sensitivity tests with different baselines and the differences were only minor. Not that much happened up to the last 50y or so really, at least compared to an ice age.<br /><br />Bear in mind that when writing research papers, they are very much aimed at the in-crowd and not a wider readership.James Annanhttps://www.blogger.com/profile/04318741813895533700noreply@blogger.comtag:blogger.com,1999:blog-9959776.post-90263301002605676512022-08-22T17:29:04.168+01:002022-08-22T17:29:04.168+01:00What is the definition of "LGM temperature an...What is the definition of "LGM temperature anomaly?" I.e., to what date's average temperature is "-4.5±1.7°C" or "-6.1±0.4°C" compared? Is it the 2000-2020 average? Is it 1950 (like the "BP" baseline)? Is it HCO peak? Is it late LIA "pre-industrial?"<br /><br />Tierney says, "Our assimilated product provides a constraint on global mean LGM cooling of −6.1 degrees Celsius (95 per cent confidence interval: −6.5 to −5.7 degrees Celsius)." Calling it "cooling" means that she's comparing with a <i><b>prior</b></i> temperature, i.e., the Eemian. But that seems very odd.<br /><br />My guess is that she doesn't really mean "cooling," she means "6.1°C cooler than _____", and calling it "cooling" is just another example of the paleoclimate community's fuzzy jargon. But what date should fill in the blank is unmentioned.<br /><br /><b>{RANT}</b> I find annoying the paleoclimate community's bad habit of using jargon which redefines and contradicts plain English. E.g., why say "BP," which stands for "Before Present," when they actually mean "before 1950"? That's pretty much guaranteed to mislead readers who aren't part of the "in crowd," and don't know the secret code. Why can't they use normal English, which means what it says, or at the very least, invent NEW terms, which don't redefine established meanings? E.g., why not call it "B1950"? <b>{/RANT}</b><br />ncdave4lifehttps://www.blogger.com/profile/05022815923433003840noreply@blogger.com