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lizzieinvancouver / decsens

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lit review of other ways to deal with issue #4

Closed lizzieinvancouver closed 4 years ago

lizzieinvancouver commented 4 years ago

For example, Q10, "The temperature sensitivity of soil respiration is often expressed as the Q10 value; that is, the factor by which soil respiration increases by a 10°C increase in temperature (e.g., Kirschbaum, 1995; Van't Hoff, 1898)." this article

lizzieinvancouver commented 4 years ago

Dan is taking the lead on this! Cat will help when done with issue #1 and issue #2 .

lizzieinvancouver commented 4 years ago

@dbuona Thanks for updating the table! Can you add all your refs to the git bib file? Once they're in there I will try to track down the Zhu 2019 one for you. Please ping me on here, when ready. Thanks!

dbuona commented 4 years ago

citations...added.

On Sun, Feb 9, 2020 at 11:43 PM lizzieinvancouver notifications@github.com wrote:

@dbuona https://github.com/dbuona Thanks for updating the table! Can you add all your refs to the git bib file? Once they're in there I will try to track down the Zhu 2019 one for you. Please ping me on here, when ready. Thanks!

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lizzieinvancouver commented 4 years ago

Zhu2019 (from Dan's email): The paper attributes the decrease in temperature sensitivity to biological factors-- with no mention of statistics. Yet they sort of poke at the issue here:

Jena inversions were divided into warmer and cooler groups based on the median value of temperature time series. The warmer years consistently have a lower temperature sensitivity of CDR, GPP, and NCE in both spring and summer (Fig. 11). Generally, the differences of temperature sensitivity of CDR and NCE in summer between warmer/cooler groups of years are more significant than those in spring. The lower temperature sensitivity of summer GPP in warmer years (Fig. 11) suggests that warming could potentially contribute to the more negative summer sCDR/Tsa, although in the long term other factors like CO2 fertilization may interact with temperature effects.

lizzieinvancouver commented 4 years ago

@dbuona I think this paper would have the issue as they define CDR based on date ranges (some fixed, page 5851) and are doing effectively regression to calculate change on update per day. They say they follow Piao 2017.

We examined how the temperature sensitivity of detrended seasonal atmospheric CO2 drawdown has changed using a 17-yr moving time window from 1974 to 2014. By detrending, our analysis is focused on the in- terannual variability of the temperature sensitivity. We then used multiple diagnostic models of global photo- synthesis and surface fluxes inferred from atmospheric inversions to verify our findings and investigated the possible driving factors.

lizzieinvancouver commented 4 years ago

Seems like Q_10 can have it's own issues... based on this paper. I feel like the best answer is a better generative model or proportions or logs (as best for now).