Gerald Page @[email protected]

Research scientist; plant physiological ecology and remote sensing. Views are my own. he/him.

[Gerald Page @[email protected] @gfmpage1]

Our paper on forest canopy temperature is out in PNAS today! Forest canopies can get much warmer than air temperature, and as air temperatures increase it gets worse, with troubling implications for forest carbon uptake: https://t.co/uO3YAEHQVS

[Gerald Page @[email protected] @gfmpage1]

@Judy_Dunlop It took me a moment, but once you see it you can't unsee it 😂

[Gerald Page @[email protected] @gfmpage1]

I'm very pleased to have been involved in this fun and novel approach to mapping vegetation structure using @GEDI_Knights data in sparse, tall woodlands in a remote corner of Western Australia. Good science with a solid application to biodiversity conservation.

[Gerald Page @[email protected] @gfmpage1]

A paper led by the twitter-less Chris Still where we had a good hard think about the timing and geographic distribution of heat-stress related foliage damage relative to the potential for hydraulically induced damage. Check it out!

[Dr. William Hammond @wmhammond]

Causes of Widespread Foliar Damage from the June 2021 Pacific Northwest Heat Dome: More Heat than Drought

https://t.co/VAuNKqpUB6

[Gerald Page @[email protected] @gfmpage1]

My science Twitter has gone awfully quiet... now all I get is rage tweets from a billionaire and sports gambling ads :(

I'm trying out Mastodon (@[email protected]) but am not finding much #ecophys and #remotesensing ... help?

[Alexander Shenkin @ashenkin]

Are you using or will you use #GEDI data, either in academics, private sector, or whatever? Let me know - we're gathering use cases to try to keep it up on the space station. Please RT!

[PNASNews @PNASNews]

The limited homeothermy hypothesis, a longstanding theory that forest canopy leaves can cool themselves below potentially damaging high air temperature, is not supported by evidence, a study finds. In PNAS: https://t.co/taU2FrNW7w

[FSU Research @FSUResearch]

Temperatures in forest canopies are higher than previous estimates, threatening their vital role in mitigating global warming, according to new research published by @PNASNews from @FSU_Geography @FSUCOSS Associate Professor @stephanie_pau and colleagues.
https://t.co/RXPalRNZdH

[Gerald Page @[email protected] @gfmpage1]

@vinhare Yeah I agree that the isotope data is really interesting. Different scales of measurement and different mechanisms, so reconciling the two is a big question.

[Gerald Page @[email protected] @gfmpage1]

Our paper on forest canopy temperature is out in PNAS today! Forest canopies can get much warmer than air temperature, and as air temperatures increase it gets worse, with troubling implications for forest carbon uptake: https://t.co/uO3YAEHQVS

[Gerald Page @[email protected] @gfmpage1]

@EkoLogIt @EcofunTeam @GlobalChangeBio Hi Jonathan, yes, it'll be cooler beneath the canopy for sure. Our study looks at the temperature of the upper canopy relative to the air above it. What's happening in the microclimate beneath the forest canopy is a different scenario.

[Gerald Page @[email protected] @gfmpage1]

@SeanMichaletz @vinhare @agformet @benjaminblonder Furthermore, the point data presented in Michaletz (2018) to validate the modeling, are the same problematic LI6400XT data presented in the 2016 paper.

[Gerald Page @[email protected] @gfmpage1]

@SeanMichaletz @vinhare @agformet @benjaminblonder Hi Sean, yes you're right. Under the right combination of biophysical conditions, homeothermy is possible, as you modeled in your paper. However, those conditions are very difficult to find in nature, or at the very least, in the forest systems we instrumented.

[Gerald Page @[email protected] @gfmpage1]

@doctorjackpine @mallory_barnes @vinhare Thanks Shawn. Temperate and tropical forests are one thing, the Arctic is something else! Really interesting stuff.

[Gerald Page @[email protected] @gfmpage1]

@macek_mm Thanks Martin. Air temperature was measured above the canopy on the flux tower.

[Gerald Page @[email protected] @gfmpage1]

@vinhare As an aside, we've also previously demonstrated that homeothermy in the LI6400XT point data in Michaletz et al. (2016) were most likely the result of a measurement error. You can replicate limited leaf homeothermy in an empty cuvette with a LI6400XT (https://t.co/ZZsJQKBjyF)

[Gerald Page @[email protected] @gfmpage1]

@vinhare So a good question to ask now is what exactly is the δ18O data telling us, if we weren't able to see any sign of it in the paired flux-canopy temperature data?

[EcossNAU @EcossNau]

Congratulations to all the co-authors! Full study here: https://t.co/662wfAH9sm Video credit: Donald Aubrecht and Andrew Richardson. @PhenoCam

[Gerald Page @[email protected] @gfmpage1]

@BharatRastogi @griffithdan @stephanie_pau @BHelliker

[Gerald Page @[email protected] @gfmpage1]

Check out the nice summary on https://t.co/rlFRtgYPc1 https://t.co/1YOKUu3ux7