Episodic deluges in simulated hothouse climates
Episodic deluges in simulated hothouse climates
复制标题
模拟温室气候中的间歇性洪水
DOI：
10.1038/s41586-021-03919-z
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发表时间：
2021
期刊：
影响因子：
64.8
通讯作者：
Wordsworth, Robin D.
中科院分区：
文献类型：
--
作者：
Seeley, Jacob T.;Wordsworth, Robin D.
地球遥远的过去和潜在的未来包括极端温暖的“温室”气候状态，但对大气在这种状态下的行为知之甚少。温室气候的一个显著特征是，由于水蒸气红外窗口区域的关闭，它们的特征是对流层较低的辐射加热，而不是冷却。以前的工作表明，这可能会导致温度逆温和云量的实质性变化，，在这里，我们进行模拟，明确解决对流，并发现低对流层辐射加热温室气候导致水文循环从准稳定制度转变为“弛豫振荡器”制度，在这种情况下，降水发生在短期和强烈的爆发分开多日干旱。过渡到振荡制度是伴随着强烈增强的当地降水通量，云量大幅增加，和一个短暂的积极（不稳定）的气候反馈参数。我们的研究结果表明，温室气候可能具有一种新的形式的“时间”对流自组织，与云覆盖和侵蚀过程的影响。
Earth’s distant past and potentially its future include extremely warm ‘hothouse’ climate states, but little is known about how the atmosphere behaves in such states. One distinguishing characteristic of hothouse climates is that they feature lower-tropospheric radiative heating, rather than cooling, due to the closing of the water vapour infrared window regions. Previous work has suggested that this could lead to temperature inversions and substantial changes in cloud cover, , –, but no previous modelling of the hothouse regime has resolved convective-scale turbulent air motions and cloud cover directly, thus leaving many questions about hothouse radiative heating unanswered. Here we conduct simulations that explicitly resolve convection and find that lower-tropospheric radiative heating in hothouse climates causes the hydrologic cycle to shift from a quasi-steady regime to a ‘relaxation oscillator’ regime, in which precipitation occurs in short and intense outbursts separated by multi-day dry spells. The transition to the oscillatory regime is accompanied by strongly enhanced local precipitation fluxes, a substantial increase in cloud cover, and a transiently positive (unstable) climate feedback parameter. Our results indicate that hothouse climates may feature a novel form of ‘temporal’ convective self-organization, with implications for both cloud coverage and erosion processes.
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影响因子：
5.2
作者：
Torri, Giuseppe;Kuang, Zhiming
通讯作者：
Kuang, Zhiming
影响因子：
6.8
作者：
Wing AA;Stauffer CL;Becker T;Reed KA;Ahn MS;Arnold NP;Bony S;Branson M;Bryan GH;Chaboureau JP;De Roode SR;Gayatri K;Hohenegger C;Hu IK;Jansson F;Jones TR;Khairoutdinov M;Kim D;Martin ZK;Matsugishi S;Medeiros B;Miura H;Moon Y;Müller SK;Ohno T;Popp M;Prabhakaran T;Randall D;Rios-Berrios R;Rochetin N;Roehrig R;Romps DM;Ruppert JH Jr;Satoh M;Silvers LG;Singh MS;Stevens B;Tomassini L;van Heerwaarden CC;Wang S;Zhao M
通讯作者：
Zhao M
影响因子：
4.9
作者：
Pendergrass, Angeline G.;Hartmann, Dennis L.
通讯作者：
Hartmann, Dennis L.
DOI：
10.1016/j.jqsrt.2013.07.002
发表时间：
2013-11-01
影响因子：
2.3
作者：
Rothman, L. S.;Gordon, I. E.;Wagner, G.
通讯作者：
Wagner, G.
设计二氧化碳辐射解毒剂
影响因子：
5.2
作者：
J. Seeley;N. Lutsko;David William Keith
通讯作者：
David William Keith