“北极绿化”意味着增加植被的空间范围,增加特定类型的植被,或都有?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 04 - 12 - t16:38:20z //www.hoelymoley.com/feeds/question/14300 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/14300 1 “北极绿化”意味着增加植被的空间范围,增加特定类型的植被,或都有? Sujai纳杰 //www.hoelymoley.com/users/12661 2018 - 05 - 30 - t04:27:43z 2018 - 06 - 15 - t17:45:35z < p >我想研究生物挥发性有机化合物的影响(BVOCs)在北极地区的大气化学的“绿化”,通过一氧化碳作为一个代理。< / p > //www.hoelymoley.com/questions/14300/-/14430 # 14430 2 舍伍德博茨回答的“北极绿化”意味着增加植被的空间范围,增加特定类型的植被,或都有? 舍伍德博茨 //www.hoelymoley.com/users/13145 2018 - 06 - 15 - t12:19:45z 2018 - 06 - 15 - t17:45:35z < p >你有不清楚的问题。看到我的评论本身的问题。< / p >

Answering just the question:

I've not seen a formal definition of arctic greening. Conceptually it's replacing a landscape that is in effect a cold desert with one that has:

  • Longer growing season.
  • Greater biodiversity
  • Greater gross photosynthesis.

You would think that it would also be greater net photosynthesis too, but much of the arctic has large deposits of peat moss, forest duff and sedges. With warmer temperatures we will likely see greater bacterial action on the peat. Not clear which way the carbon/acre figure will move.

It's also not clear what the effect of an open oceans in the high arctic will be. Depending on the nutrient levels in those waters could see a lot more phytoplankton. BVOC exchange between ocean and atmosphere?

You can get a first level approximation substituting latitude for time. I expect BVOCs to disperse fairly quickly so you would need to measure at ground level. Analyzing a bunch of sites that are representative of the various major communities -- Boreal forest, tree line, tundra/puckey-brush (scrub willow, birch) Tundra/moss, forbs; Rock.

For a preliminary analysis you don't even need to go to the arctic. Use a convenient mountain.

That can nail down quantities of BVOCs. Correlate that with HCOH to see how good a proxy HCOH is for BVOC.

This leaves a bunch of unanswered questions:

Is the time frame for the degradation of HCOH similar to for other BVOCs? You may have to do radioactive tracer tests in containers set at similar conditions of temperature, pressure and UV illumination.

What are the degradation products? What are the effects of these? Do any of the original products or their degradation products acts as catalysts?

I think you have bitten off a big research project.

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