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全球变暖导致北极农业吗?

据我所知,全球变暖将使种植粮食困难得多像美国中西部地区,因为对于大多数作物温度会过高。与此同时,北极和南极地区将加热和冻土融化。将阿拉斯加、西伯利亚和加拿大北部然后成为适合大规模农业?如果是这样,这足以弥补损失的生产在温暖的地区?还是有其他因素在这些领域,这将使农业不切实际?

回答

加拿大的农业地区:[![在这里输入图像描述][1]][1]位于合适的土壤类型:[! [http://www.fao.org/ag/agp/agpc/doc/counprof/canada/pics/Figure%204b.jpg][2]][2]的大部分粮食面积是(加拿大地盾)(https://en.wikipedia.org/wiki/Canadian_Shield)生态学(下面红色部分):>当前盾是很薄的表面表达土壤>躺在基岩之上,有许多裸露的露头。这种安排>在冰河时代是由严重的冰川作用,岩石覆盖>盾和刮干净。加拿大地盾的低地>有一个非常密集的土壤不适合造林;它还>包含了许多沼泽和沼泽(沼泽地)。其他地区土壤>粗不保湿好,与全年>冻土冻。我认为“粗粒土”(冰碛物)(https://en.wikipedia.org/wiki/Till)。[![在这里输入图像描述][3]][3]这是冻土融化。我不认为这将是适合农业。 [![enter image description here][4]][4] [CLIMATE CHANGE ADAPTATION AND CANADA’S CROPS AND FOOD SUPPLY (2013)](https://act-adapt.org/wp-content/uploads/2013/07/07-13-CFS-Background-WEB.pdf) (122 pages) discusses warming, precipitation, soils and other factors. > There is definitely potential for a northern expansion of agriculture > as a result of changes in heat and moisture in [the western prairies], > although most of these lands will remain only marginally suitable for > farming because of poor soil conditions. Edit:[![enter image description here][5]][5] An eroding coastline exposes permafrost along the Mackenzie Delta. Photo: Roger McLeod / Natural Resources Canada **High resolution version** from [Arctic tundra is 80 per cent permafrost. What happens when it thaws?](https://thenarwhal.ca/arctic-tundra-is-80-per-cent-permafrost-what-happens-when-it-thaws/) - The Narwhal: https://thenarwhal.ca/wp-content/uploads/2019/03/Coastal-Erosion-Permafrost-Roger-McLeod-NRCan--e1551913545654-1920x1080.jpeg Edit, Oct., 2020: [Canada could be a huge climate change winner when it comes to farmland][6] > [![enter image description here][7]][7] In this map from the study, areas that transition from no current suitability for major commodity crops to suitability for one or more crops are depicted in blue, while currently uncultivated areas that transition to suitability for multiple major commodity crops are shown in red. ([Hannah et al, 2020][8]) >KC acknowledged the study looked only at climate as a factor when determining where crops could be grown in the future, and didn't take into account things like soil quality. >Soil scientist David Burton of Dalhousie University, who wasn't involved in the study, says that could have a big impact on how much of the potential new farmland is actually arable. "The soils of Southern Canada have taken 10,000 years to develop," he said. "Rapid change wouldn't necessarily make soils in Northern Canada suitable for production." >Johanna Wandel, an associate professor of geography at the University of Waterloo who edited a book called Farming in a Changing Climate, agrees the soil in much of Canada would likely be unsuitable for growing crops, as it's too rocky or acidic. [1]: https://i.stack.imgur.com/XRR0c.jpg [2]: https://i.stack.imgur.com/4OhJ9.jpg [3]: https://i.stack.imgur.com/s0kNs.jpg [4]: https://i.stack.imgur.com/ZwzM4.jpg [5]: https://i.stack.imgur.com/EYX1i.jpg [6]: http://Canada%20could%20be%20a%20huge%20climate%20change%20winner%20when%20it%20comes%20to%20farmland [7]: https://i.stack.imgur.com/QF9sU.jpg [8]: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0228305

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\ begingroup美元事情都有两面性,在北极地区变暖将改善农业生产。但一切不平等;正如你所指出的,这并不是完全'表层土。另外,它往往是数百英里远离现有基础设施和数千英里远离人群,由于气候变暖将直接失去食物生产力。 \ endgroup美元
- - - - - -jeffronicus
2017年9月3日,在4:56
1

\ begingroup美元农民能够从其他地方进口土壤(如农场现在太热的地区),放下,或土壤不工作呢? \ endgroup美元
- - - - - -sbl
2017年9月3日,在十七34
2

\ begingroup美元 @sbl我估计移动数千英里的铁路要花费几千美元每英亩。不包括刮起来,移动它的铁路和传播。 \ endgroup美元
- - - - - -基思·麦克
2017年9月4日,在2:53
\ begingroup美元显示的照片永久冻土和说的永冻层地区,不适合农业并不完全令人信服。这是另一个图片,不支持你的不科学的回答:en.wikipedia.org/wiki/Permafrost # /媒体/… \ endgroup美元
- - - - - -Communisty
2017年9月4日,美东
1

\ begingroup美元 @Communisty他们需要一个手提钻,因为他们是挖掘冷冻泥浆(或脏冰),可以多米深。但你有一个很好的观点。我想一些(平)地区可能会逐渐融化,避免灾难性的崩溃。这可能需要很长时间在此期间和冷表面可能会不稳定。应该有地方去年以来的永冻层已经完全融化冰川作用,所以我们可以看到土壤是什么样子,但我不知道的。 \ endgroup美元
- - - - - -基思·麦克
2017年9月4日,在十七29

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