Iris hypothesis

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The warmly wet air on the tropical ocean forms the cloud which developed in the plumb direction to call if a convection is core, and I am cooled over from the cloud top of the cirrus that developed it horizontally, and the air which became heavy descends, and the upper part troposphere is humidified. In around marine surfaces under the boundary layer, atmosphere is always met by a low stratus in high humidity for a while.

An iris hypothesis (iris かせつ British: Iris hypothesis) is a theory suggested in 2001 by Richard Lynn then (English version) professor and suggests that increase of the sea surface water temperature in the tropical zone brings the decrease of the cirrus and leakage of the infrared emission from the further earth atmosphere [¹]. This suggested infrared radiative leakage became the negative feedback, and it was supposed that I would have chilling effect generally. By the opinion of the majority, the increase of the sea surface water temperature causes the increase of the cirrus that will have an effect to warm the sea surface more and, as a result, does it when it will be for positive feedback.

Thereafter other scientists inspected the hypothesis. Some scientists concluded that there was not the evidence in support of a hypothesis at all [²]. One scientist found the evidence that increase of the sea surface water temperature in the tropical zone really decreased a cirrus, but still, as for the effect, positive feedback knew that it was rather than the negative feedback that supposed of the phosphorus then [³]; [⁴]. However, some evidence with possibility in support of a hypothesis came to stand out relatively recently [⁵]; [⁶] [⁷].

For example, I show remarkable warming with the climate model in the troposphere than an earth surface, but the remarkable warming in the troposphere is not really observed [⁸]. This suggests that the existence of the cloud accounts for a big ratio for the uncertainty in the climate model. I open and close the tropical cloud like an iris (iris) and function as a huge heat radiation tongue to emit surplus energy, and this huge tropical zone heat radiation mouth works to keep a fixed temperature, and it is very strong negative feedback. This tropical heat radiation tongue cannot reappear with the climate model, and it is in climate model and one of the factors indicating the remarkable estrangement with the temperature change in the real troposphere.

Footnote

1. ^ Lindzen, R.S., M.-D. Chou, and A.Y. Hou (2001). "Does the Earth have an adaptive infrared iris?". Bull. Amer. Met. Soc. 82: 417-432. doi: 10.1175/1520-0477(2001)082<0417:DTEHAA>2.3.CO; 2. http://eaps.mit.edu/faculty/lindzen/adinfriris.pdf. 
2. ^ Hartman, D.L., and M.L. Michelsen (2002). "No evidence for iris". Bull. Amer. Met. Soc. 83: 249-254. doi: 10.1175/1520-0477(2002)083<0249:NEFI>2.3.CO; 2. http://ams.allenpress.com/archive/1520-0477/83/2/pdf/i1520-0477-83-2-249.pdf. 
3. ^ Fu, Q., Baker, M., and Hartman, D. L. (2002). "Tropical cirrus and water vapor: an effective Earth infrared iris feedback?". Atmos. Chem. Phys. 2 (1): 31–37. http://www.atmos-chem-phys-discuss.net/1/221/2001/acpd-1-221-2001-print.pdf. 
4. ^ Lin, B., B. Wielicki, L. Chambers, Y. Hu, and K.-M. Xu (2002). "The Iris Hypothesis: A Negative or Positive Cloud Feedback?". J. Clim. 15 (1): 3-7. doi: 10.1175/1520-0442(2002)015<0003:TIHANO>2.0.CO; 2. http://ams.allenpress.com/archive/1520-0442/15/1/pdf/i1520-0442-15-1-3.pdf. 
5. ^ Spencer, R.W., Braswell, W.D., Christy, J.R., Hnilo, J. (2007). "Cloud and radiation budget changes associated with tropical intraseasonal oscillations". Geophys. Res. Lett. It is L15707. doi: 34 10.1029/2007GL029698. http://www.drroyspencer.com/Spencer_07GRL.pdf. 
6. ^ Spencer, R.W., Braswell, W.D. (2008). "Potential Biases in Feedback Diagnosis from Observational Data: A Simple Model Demonstration". J. Clim. 21: 5624. doi: 10.1175/2008JCLI2253.1. http://www.gfdl.gov/~ih/jerusalem_papers/spencer.pdf. 
7. ^ Rondanelli, R., and R. S. Lindzen (2008). "Observed variations in convective precipitation fraction and stratiform area with sea surface temperature." J. Geophys. Res. 113: D16119. doi: 10.1029/2008JD010064. 
8. ^ Douglass, D. H.; Christy, J. R.; Pearson, B. D.; Singer, S. F. (2007). "A comparison of tropical temperature trends with model predictions". Int. J. Climatol. 28: 1693-1701. doi: 10.1002/joc.1651. http://ephysics.fileave.com/Climate/Douglass-IntJClimatol.pdf. 

Allied item

• Earth dusk
• Global warming

Outside link

• NASA summary of Global Warming and Iris Hypothesis
• Evidence against the Iris Hypothesis
• New satellites to resolve Hypothesis
• Cloudsat and CALIPSO satellite summary

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