Outgoing Longwave Radiation (OLR)
Outgoing Longwave Radiation (OLR) data at the top of the atmosphere are observed from the Advanced Very High Resolution Radiometer (AVHRR) instrument aboard the NOAA polar orbiting spacecraft. Data are centered across equatorial areas from 160°E to 160°W longitude. The raw data are converted into a standardized anomaly index. Negative (Positive) OLR are indicative of enhanced (suppressed) convection and hence more (less) cloud coverage typical of El Niño (La Niña) episodes. More (Less) convective activity in the central and eastern equatorial Pacific implies higher (lower), colder (warmer) cloud tops, which emit much less (more) infrared radiation into space. More information can be found at the Climate Prediction Center OLR page.
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Source: https://www.cpc.ncep.noaa.gov/data/indices/olr
| Date | OLR (W/m2) |
|---|---|
| 197406 | +1.1 |
| 197407 | +0.1 |
| 197408 | +1.1 |
| 197409 | +1.1 |
| 197410 | +1.2 |
| 197411 | +1.2 |
| 197412 | +0.3 |
| 197501 | -0.1 |
| 197502 | +1.1 |
| 197503 | +1.1 |
| 197504 | +0.7 |
| 197505 | +1.4 |
| 197506 | +1.0 |
| 197507 | +1.3 |
| 197508 | +1.5 |
| 197509 | +1.4 |
| 197510 | +1.5 |
| 197511 | +1.5 |
| 197512 | +2.1 |
| 197601 | +1.2 |
| 197602 | +1.2 |
| 197603 | +0.3 |
| 197604 | +0.7 |
| 197605 | +0.4 |
| 197606 | -0.3 |
| 197607 | -0.4 |
| 197608 | -0.5 |
| 197609 | -0.2 |
| 197610 | -0.4 |
| 197611 | +0.4 |
| 197612 | -0.6 |
| 197701 | -0.6 |
| 197702 | +0.6 |
| 197703 | -1.2 |
| 197704 | -0.1 |
| 197705 | +0.4 |
| 197706 | +0.4 |
| 197707 | -0.1 |
| 197708 | +0.1 |
| 197709 | +0.1 |
| 197710 | -0.1 |
| 197711 | -0.5 |
| 197712 | -1.7 |
| 197801 | -0.8 |
| 197802 | -0.9 |
| 197803 | -999.9 |
| 197804 | -999.9 |
| 197805 | -999.9 |
| 197806 | -999.9 |
| 197807 | -999.9 |
| 197808 | -999.9 |
| 197809 | -999.9 |
| 197810 | -999.9 |
| 197811 | -999.9 |
| 197812 | -999.9 |
| 197901 | -0.6 |
| 197902 | -0.6 |
| 197903 | -0.3 |
| 197904 | +0.3 |
| 197905 | 0.0 |
| 197906 | +0.4 |
| 197907 | +0.6 |
| 197908 | +0.3 |
| 197909 | 0.0 |
| 197910 | -0.6 |
| 197911 | -0.3 |
| 197912 | -0.3 |
| 198001 | +0.7 |
| 198002 | +0.4 |
| 198003 | -1.1 |
| 198004 | 0.0 |
| 198005 | -0.2 |
| 198006 | -0.7 |
| 198007 | -0.2 |
| 198008 | -0.8 |
| 198009 | +0.2 |
| 198010 | -0.2 |
| 198011 | -0.1 |
| 198012 | +0.5 |
| 198101 | +0.5 |
| 198102 | -0.7 |
| 198103 | -1.0 |
| 198104 | -0.9 |
| 198105 | +0.5 |
| 198106 | +0.4 |
| 198107 | +0.2 |
| 198108 | +1.0 |
| 198109 | +0.1 |
| 198110 | +0.3 |
| 198111 | +0.5 |
| 198112 | 0.0 |
| 198201 | +1.1 |
| 198202 | +0.1 |
| 198203 | -0.6 |
| 198204 | -0.0 |
| 198205 | +0.4 |
| 198206 | -0.2 |
| 198207 | -1.1 |
| 198208 | -1.6 |
| 198209 | -1.3 |
| 198210 | -1.7 |
| 198211 | -1.8 |
| 198212 | -0.7 |
| 198301 | -1.4 |
| 198302 | -0.7 |
| 198303 | 0.0 |
| 198304 | +0.3 |
| 198305 | -0.9 |
| 198306 | -0.9 |
| 198307 | -0.9 |
| 198308 | -0.0 |
| 198309 | 0.0 |
| 198310 | +0.5 |
| 198311 | +0.4 |
| 198312 | +1.3 |
| 198401 | +1.9 |
| 198402 | +1.9 |
| 198403 | +1.2 |
| 198404 | +1.1 |
| 198405 | +0.7 |
| 198406 | +0.5 |
| 198407 | +0.2 |
| 198408 | +0.3 |
| 198409 | +0.4 |
| 198410 | +0.3 |
| 198411 | 0.0 |
| 198412 | +0.3 |
| 198501 | +0.3 |
| 198502 | +1.2 |
| 198503 | -0.7 |
| 198504 | +0.8 |
| 198505 | +1.1 |
| 198506 | +0.5 |
| 198507 | +0.5 |
| 198508 | +0.5 |
| 198509 | +0.1 |
| 198510 | +0.3 |
| 198511 | +0.1 |
| 198512 | +0.2 |
| 198601 | +0.3 |
| 198602 | +0.9 |
| 198603 | +1.1 |
| 198604 | +0.4 |
| 198605 | +0.3 |
| 198606 | -0.2 |
| 198607 | -0.1 |
| 198608 | +0.3 |
| 198609 | -0.9 |
| 198610 | -0.6 |
| 198611 | -1.3 |
| 198612 | -2.2 |
| 198701 | -2.2 |
| 198702 | -2.3 |
| 198703 | -1.4 |
| 198704 | -1.3 |
| 198705 | -1.9 |
| 198706 | -1.2 |
| 198707 | -2.1 |
| 198708 | -1.5 |
| 198709 | -0.5 |
| 198710 | -1.0 |
| 198711 | -0.4 |
| 198712 | -1.1 |
| 198801 | -0.8 |
| 198802 | -0.7 |
| 198803 | +0.4 |
| 198804 | +0.2 |
| 198805 | +0.5 |
| 198806 | +0.9 |
| 198807 | +1.0 |
| 198808 | +1.2 |
| 198809 | +1.2 |
| 198810 | +1.0 |
| 198811 | +1.4 |
| 198812 | +1.8 |
| 198901 | +1.8 |
| 198902 | +1.7 |
| 198903 | +1.3 |
| 198904 | +0.6 |
| 198905 | +0.4 |
| 198906 | +0.7 |
| 198907 | +0.5 |
| 198908 | +0.6 |
| 198909 | +0.7 |
| 198910 | +0.4 |
| 198911 | -0.4 |
| 198912 | 0.0 |
| 199001 | -0.9 |
| 199002 | -1.0 |
| 199003 | -1.5 |
| 199004 | -0.8 |
| 199005 | -0.0 |
| 199006 | +0.1 |
| 199007 | -0.1 |
| 199008 | -0.6 |
| 199009 | -0.6 |
| 199010 | 0.0 |
| 199011 | -0.2 |
| 199012 | -0.3 |
| 199101 | -0.3 |
| 199102 | -0.6 |
| 199103 | -0.4 |
| 199104 | -0.0 |
| 199105 | -0.1 |
| 199106 | -0.2 |
| 199107 | -0.4 |
| 199108 | -0.9 |
| 199109 | -0.6 |
| 199110 | -0.4 |
| 199111 | -2.3 |
| 199112 | -1.6 |
| 199201 | -2.1 |
| 199202 | -1.3 |
| 199203 | -2.1 |
| 199204 | -1.7 |
| 199205 | -1.8 |
| 199206 | -1.0 |
| 199207 | -0.3 |
| 199208 | -0.1 |
| 199209 | +0.1 |
| 199210 | -0.4 |
| 199211 | -0.9 |
| 199212 | -1.3 |
| 199301 | -0.6 |
| 199302 | -1.6 |
| 199303 | -1.0 |
| 199304 | -2.1 |
| 199305 | -1.5 |
| 199306 | -1.4 |
| 199307 | -1.2 |
| 199308 | -0.5 |
| 199309 | -0.8 |
| 199310 | -1.4 |
| 199311 | +0.1 |
| 199312 | -0.5 |
| 199401 | 0.0 |
| 199402 | +0.6 |
| 199403 | +0.2 |
| 199404 | -0.4 |
| 199405 | -0.2 |
| 199406 | +0.1 |
| 199407 | -0.2 |
| 199408 | -0.5 |
| 199409 | -0.9 |
| 199410 | -0.4 |
| 199411 | -1.2 |
| 199412 | -2.6 |
| 199501 | -1.6 |
| 199502 | -0.6 |
| 199503 | -0.0 |
| 199504 | +0.2 |
| 199505 | +0.2 |
| 199506 | +0.5 |
| 199507 | +0.5 |
| 199508 | +0.8 |
| 199509 | +0.5 |
| 199510 | +1.0 |
| 199511 | +1.1 |
| 199512 | +1.2 |
| 199601 | +1.9 |
| 199602 | +1.6 |
| 199603 | +1.0 |
| 199604 | +0.4 |
| 199605 | +0.4 |
| 199606 | +0.5 |
| 199607 | +0.6 |
| 199608 | +0.6 |
| 199609 | +0.8 |
| 199610 | +0.6 |
| 199611 | +0.8 |
| 199612 | +0.9 |
| 199701 | +0.6 |
| 199702 | +0.5 |
| 199703 | -1.0 |
| 199704 | -1.2 |
| 199705 | -1.7 |
| 199706 | -0.9 |
| 199707 | -1.4 |
| 199708 | -1.6 |
| 199709 | -1.2 |
| 199710 | -2.4 |
| 199711 | -0.4 |
| 199712 | -1.3 |
| 199801 | -0.6 |
| 199802 | -0.3 |
| 199803 | +0.1 |
| 199804 | +1.0 |
| 199805 | -0.4 |
| 199806 | -0.0 |
| 199807 | +0.6 |
| 199808 | +0.7 |
| 199809 | +1.0 |
| 199810 | +0.9 |
| 199811 | +1.3 |
| 199812 | +1.5 |
| 199901 | +1.9 |
| 199902 | +1.2 |
| 199903 | +1.4 |
| 199904 | +1.0 |
| 199905 | +0.7 |
| 199906 | +0.6 |
| 199907 | +0.3 |
| 199908 | +0.8 |
| 199909 | +1.1 |
| 199910 | +1.0 |
| 199911 | +0.9 |
| 199912 | +2.0 |
| 200001 | +1.9 |
| 200002 | +2.2 |
| 200003 | +1.7 |
| 200004 | +1.1 |
| 200005 | +0.4 |
| 200006 | +0.8 |
| 200007 | +0.9 |
| 200008 | -0.0 |
| 200009 | +0.7 |
| 200010 | +0.5 |
| 200011 | +0.9 |
| 200012 | +1.2 |
| 200101 | +1.7 |
| 200102 | +0.6 |
| 200103 | +0.8 |
| 200104 | 0.0 |
| 200105 | -0.2 |
| 200106 | 0.0 |
| 200107 | +0.1 |
| 200108 | -0.3 |
| 200109 | +0.4 |
| 200110 | 0.0 |
| 200111 | -0.2 |
| 200112 | -1.6 |
| 200201 | -0.1 |
| 200202 | -1.2 |
| 200203 | -1.0 |
| 200204 | +0.2 |
| 200205 | +0.1 |
| 200206 | -0.7 |
| 200207 | +0.3 |
| 200208 | -1.5 |
| 200209 | -1.8 |
| 200210 | -1.3 |
| 200211 | -1.6 |
| 200212 | -1.4 |
| 200301 | -2.2 |
| 200302 | -1.1 |
| 200303 | -0.8 |
| 200304 | +0.3 |
| 200305 | +0.1 |
| 200306 | +0.8 |
| 200307 | -0.1 |
| 200308 | +0.6 |
| 200309 | +0.1 |
| 200310 | +0.1 |
| 200311 | +0.7 |
| 200312 | +0.1 |
| 200401 | -0.8 |
| 200402 | +0.4 |
| 200403 | -0.5 |
| 200404 | -0.9 |
| 200405 | +0.2 |
| 200406 | -1.1 |
| 200407 | +0.3 |
| 200408 | -0.3 |
| 200409 | -0.2 |
| 200410 | -0.2 |
| 200411 | -0.5 |
| 200412 | +0.1 |
| 200501 | -0.0 |
| 200502 | -2.2 |
| 200503 | -0.0 |
| 200504 | -0.5 |
| 200505 | -0.2 |
| 200506 | +0.1 |
| 200507 | -0.5 |
| 200508 | +0.4 |
| 200509 | -0.0 |
| 200510 | +0.1 |
| 200511 | +0.7 |
| 200512 | +1.0 |
| 200601 | +1.0 |
| 200602 | +0.4 |
| 200603 | +1.0 |
| 200604 | +0.3 |
| 200605 | +0.7 |
| 200606 | -0.4 |
| 200607 | +0.1 |
| 200608 | -0.4 |
| 200609 | -0.4 |
| 200610 | -0.9 |
| 200611 | -0.5 |
| 200612 | -0.6 |
| 200701 | -1.3 |
| 200702 | -0.1 |
| 200703 | +0.4 |
| 200704 | -0.1 |
| 200705 | 0.0 |
| 200706 | +0.4 |
| 200707 | +0.8 |
| 200708 | +0.5 |
| 200709 | +0.6 |
| 200710 | +1.1 |
| 200711 | +0.5 |
| 200712 | +1.7 |
| 200801 | +0.7 |
| 200802 | +2.1 |
| 200803 | +1.8 |
| 200804 | +1.2 |
| 200805 | +0.9 |
| 200806 | +0.3 |
| 200807 | +0.6 |
| 200808 | +0.4 |
| 200809 | +0.2 |
| 200810 | +0.9 |
| 200811 | +0.8 |
| 200812 | +1.8 |
| 200901 | +1.4 |
| 200902 | +1.3 |
| 200903 | +0.9 |
| 200904 | +0.7 |
| 200905 | +0.6 |
| 200906 | -999.9 |
| 200907 | -999.9 |
| 200908 | -999.9 |
| 200909 | -999.9 |
| 200910 | -999.9 |
| 200911 | -999.9 |
| 200912 | -2.4 |
| 201001 | -2.0 |
| 201002 | -2.3 |
| 201003 | -1.5 |
| 201004 | -0.3 |
| 201005 | +0.6 |
| 201006 | +1.0 |
| 201007 | +0.9 |
| 201008 | +1.1 |
| 201009 | +1.4 |
| 201010 | +1.5 |
| 201011 | +1.7 |
| 201012 | +2.4 |
| 201101 | +2.1 |
| 201102 | +2.3 |
| 201103 | +1.7 |
| 201104 | +1.1 |
| 201105 | +0.2 |
| 201106 | -0.1 |
| 201107 | +0.1 |
| 201108 | +0.3 |
| 201109 | +0.3 |
| 201110 | +1.1 |
| 201111 | +1.0 |
| 201112 | +1.7 |
| 201201 | +1.8 |
| 201202 | +1.9 |
| 201203 | +0.8 |
| 201204 | +0.1 |
| 201205 | -0.1 |
| 201206 | +0.2 |
| 201207 | -0.7 |
| 201208 | +0.2 |
| 201209 | -0.4 |
| 201210 | -0.2 |
| 201211 | 0.0 |
| 201212 | +0.7 |
| 201301 | -0.2 |
| 201302 | +0.1 |
| 201303 | -0.3 |
| 201304 | +0.6 |
| 201305 | +0.6 |
| 201306 | +0.4 |
| 201307 | +0.7 |
| 201308 | +0.9 |
| 201309 | +0.4 |
| 201310 | +0.2 |
| 201311 | +0.8 |
| 201312 | +0.9 |
| 201401 | +0.4 |
| 201402 | +0.2 |
| 201403 | -1.1 |
| 201404 | -1.0 |
| 201405 | -0.1 |
| 201406 | -0.7 |
| 201407 | -0.1 |
| 201408 | +0.4 |
| 201409 | +0.2 |
| 201410 | -0.1 |
| 201411 | +0.4 |
| 201412 | +0.2 |
| 201501 | +0.2 |
| 201502 | -0.2 |
| 201503 | -1.9 |
| 201504 | -1.1 |
| 201505 | -0.9 |
| 201506 | -1.4 |
| 201507 | -0.3 |
| 201508 | -1.4 |
| 201509 | -1.5 |
| 201510 | -1.4 |
| 201511 | -1.3 |
| 201512 | -2.5 |
| 201601 | -1.9 |
| 201602 | -2.4 |
| 201603 | -1.6 |
| 201604 | -0.9 |
| 201605 | -0.2 |
| 201606 | +0.1 |
| 201607 | +0.5 |
| 201608 | +0.8 |
| 201609 | +0.9 |
| 201610 | +1.0 |
| 201611 | +1.4 |
| 201612 | +1.4 |
| 201701 | +1.1 |
| 201702 | +1.4 |
| 201703 | +1.1 |
| 201704 | +0.4 |
| 201705 | +0.1 |
| 201706 | +0.6 |
| 201707 | -0.4 |
| 201708 | +0.3 |
| 201709 | +0.8 |
| 201710 | +0.7 |
| 201711 | +1.1 |
| 201712 | +0.9 |
| 201801 | +1.8 |
| 201802 | -0.0 |
| 201803 | +0.5 |
| 201804 | +1.2 |
| 201805 | +1.0 |
| 201806 | +1.1 |
| 201807 | +0.3 |
| 201808 | +0.4 |
| 201809 | +0.3 |
| 201810 | +0.4 |
| 201811 | -0.3 |
| 201812 | -0.1 |
| 201901 | -0.6 |
| 201902 | -1.9 |
| 201903 | -1.2 |
| 201904 | -0.8 |
| 201905 | -0.7 |
| 201906 | -0.3 |
| 201907 | +0.2 |
| 201908 | +0.1 |
| 201909 | +0.6 |
| 201910 | +0.6 |
| 201911 | +0.1 |
| 201912 | 0.0 |
| 202001 | -0.6 |
| 202002 | -1.3 |
| 202003 | +0.1 |
| 202004 | +0.7 |
| 202005 | +0.7 |
| 202006 | +1.1 |
| 202007 | +0.9 |
| 202008 | +0.9 |
| 202009 | +0.9 |
| 202010 | +1.2 |
| 202011 | +1.5 |
| 202012 | +2.0 |
| 202101 | +2.4 |
| 202102 | +1.1 |
| 202103 | +1.4 |
