Editing Algiers (section)

===Climate===
Algiers has a [[Mediterranean climate]] ([[Köppen climate classification]] ''Csa''). Its proximity to the Mediterranean aids in moderating the city's temperatures. As a result, Algiers usually does not see the extreme temperatures that are experienced in the adjacent interior. Algiers on average receives roughly {{convert|600|mm|in|0}} of rain per year, the bulk of which is seen between October and April. The precipitation is higher than in most of coastal Mediterranean Spain, and similar to most of coastal Mediterranean France, as opposed to the interior North African semi-arid or arid climate.

Snow is very rare; in 2012, the city received {{convert|100|mm|in|0}} of snowfall, its first snowfall in eight years.<ref>{{cite news |title=European Chill Moves West, 122 Die in Ukraine |first=Richard |last=Balmforth |date=4 February 2012 |agency=Reuters |url=https://www.reuters.com/article/us-europe-weather-idUSTRE8130NK20120204 |access-date=30 June 2017 |archive-url=https://web.archive.org/web/20140914142912/http://www.reuters.com/article/2012/02/04/us-europe-weather-idUSTRE8130NK20120204 |archive-date=14 September 2014 |url-status=live }}</ref>

{{Weather box
|location = Algiers ([[Houari Boumediene Airport]]) 1991–2020, extremes 1838–present
|metric first = yes
|single line = yes
|Jan record high C = 27.6
|Feb record high C = 31.4
|Mar record high C = 36.3
|Apr record high C = 36.5
|May record high C = 41.1
|Jun record high C = 44.6
|Jul record high C = 48.7
|Aug record high C = 47.5
|Sep record high C = 44.4
|Oct record high C = 39.5
|Nov record high C = 34.4
|Dec record high C = 30.4
|year record high C = 48.7
|Jan high C = 17.1
|Feb high C = 17.5
|Mar high C = 19.7
|Apr high C = 21.8
|May high C = 25.0
|Jun high C = 29.0
|Jul high C = 32.1
|Aug high C = 32.9
|Sep high C = 29.8
|Oct high C = 26.5
|Nov high C = 21.2
|Dec high C = 18.2
|year high C = 24.2
|Jan mean C = 11.3
|Feb mean C = 11.5
|Mar mean C = 13.6
|Apr mean C = 15.6
|May mean C = 18.8
|Jun mean C = 22.6
|Jul mean C = 25.7
|Aug mean C = 26.6
|Sep mean C = 23.9
|Oct mean C = 20.4
|Nov mean C = 15.7
|Dec mean C = 12.6
|year mean C = 18.2
|Jan low C = 5.5
|Feb low C = 5.6
|Mar low C = 7.5
|Apr low C = 9.4
|May low C = 12.6
|Jun low C = 16.2
|Jul low C = 19.4
|Aug low C = 20.4
|Sep low C = 17.9
|Oct low C = 14.3
|Nov low C = 10.1
|Dec low C = 7.0
|year low C = 12.2
|Jan record low C = -3.3
|Feb record low C = -1.9
|Mar record low C = -1.0
|Apr record low C = -0.8
|May record low C = 2.6
|Jun record low C = 5.5
|Jul record low C = 9.0
|Aug record low C = 9.5
|Sep record low C = 8.2
|Oct record low C = 4.1
|Nov record low C = -0.1
|Dec record low C = -2.3
|year record low C = -3.3
|precipitation colour = green
|Jan precipitation mm = 84.2
|Feb precipitation mm = 72.1
|Mar precipitation mm = 58.9
|Apr precipitation mm = 58.0
|May precipitation mm = 39.0
|Jun precipitation mm = 8.6
|Jul precipitation mm = 1.5
|Aug precipitation mm = 10.6
|Sep precipitation mm = 27.5
|Oct precipitation mm = 51.5
|Nov precipitation mm = 102.7
|Dec precipitation mm = 86.4
|year precipitation mm = 601
|unit precipitation days = 1 mm
|Jan precipitation days = 8.4
|Feb precipitation days = 8.7
|Mar precipitation days = 7.0
|Apr precipitation days = 6.1
|May precipitation days = 4.3
|Jun precipitation days = 1.4
|Jul precipitation days = 0.4
|Aug precipitation days = 1.4
|Sep precipitation days = 4.0
|Oct precipitation days = 5.4
|Nov precipitation days = 9.2
|Dec precipitation days = 8.2
|year precipitation days = 64.5
|Jan humidity = 71
|Feb humidity = 66
|Mar humidity = 65
|Apr humidity = 62
|May humidity = 66
|Jun humidity = 66
|Jul humidity = 67
|Aug humidity = 65
|Sep humidity = 68
|Oct humidity = 66
|Nov humidity = 68
|Dec humidity = 68
|year humidity = 67
|Jan sun = 139.5
|Feb sun = 158.2
|Mar sun = 207.7
|Apr sun = 228.0
|May sun = 300.7
|Jun sun = 300.0
|Jul sun = 353.4
|Aug sun = 325.5
|Sep sun = 267.0
|Oct sun = 198.4
|Nov sun = 153.0
|Dec sun = 145.7
|year sun = 2777.1
|Jand sun = 4.5
|Febd sun = 5.6
|Mard sun = 6.7
|Aprd sun = 7.6
|Mayd sun = 9.7
|Jund sun = 10.0
|Juld sun = 11.4
|Augd sun = 10.5
|Sepd sun = 8.9
|Octd sun = 6.4
|Novd sun = 5.1
|Decd sun = 4.7
|yeard sun = 7.6
|source 1 = [[National Oceanic and Atmospheric Administration|NOAA]]<ref name=WMOCLINO>{{cite web
| archive-url = https://web.archive.org/web/20230826215631/https://www.nodc.noaa.gov/archive/arc0216/0253808/1.1/data/0-data/Region-1-WMO-Normals-9120/Algeria/CSV/AlgerDarElBeida_60390.csv
| archive-date = 26 August 2023
| url = https://www.nodc.noaa.gov/archive/arc0216/0253808/1.1/data/0-data/Region-1-WMO-Normals-9120/Algeria/CSV/AlgerDarElBeida_60390.csv
| title = Alger Dar-el-Beida Climate Normals 1991–2020
| work = World Meteorological Organization Climatological Standard Normals (1991–2020)
| publisher = National Oceanic and Atmospheric Administration
| access-date = 26 August 2023}}</ref>
|source 2 = Arab Meteorology Book (humidity and sun),<ref name=climate>{{cite web
| url = http://extras.springer.com/2007/978-1-4020-4577-6/Book_Shahin_ISBN_9781402045776_Appendix.pdf
| title = Appendix I: Meteorological Data
| publisher = Springer
| access-date = 16 October 2016
| archive-url = https://web.archive.org/web/20160304072830/http://extras.springer.com/2007/978-1-4020-4577-6/Book_Shahin_ISBN_9781402045776_Appendix.pdf
| archive-date = 4 March 2016
| url-status = live
}}</ref> Meteo Climat (record highs and lows)<ref name = meteoclimat>{{cite web
| url = http://meteo-climat-bzh.dyndns.org/index.php?page=stati&id=15
| title = Station Alger
| publisher = Meteo Climat
| language = fr
| access-date = 16 October 2016
| archive-date = 2 February 2021
| archive-url = https://web.archive.org/web/20210202085212/http://meteo-climat-bzh.dyndns.org/index.php?page=stati&id=15
| url-status = live
}}</ref>
|date=January 2011}}

==== Climate change ====
A 2019 paper published in [[PLOS One]] estimated that under [[Representative Concentration Pathway#4.5|Representative Concentration Pathway 4.5]], a "moderate" scenario of [[climate change]] where global warming reaches ~{{convert|2.5-3|C-change|F-change}} by 2100, the climate of Algiers in the year 2050 would most closely resemble the current climate of [[Perth]] in Australia. The annual temperature would increase by {{convert|2.6|C-change|F-change}}, and the temperature of the warmest month by {{convert|1.9|C-change|F-change}}, while the temperature of the coldest month would be {{convert|3.8|C-change|F-change}} higher.<ref>{{cite journal |last1=Bastin |first1=Jean-François |last2=Clark |first2=Emily |last3=Elliott |first3=Thomas |last4=Hart |first4=Simon |last5=van den Hoogen |first5=Johan |last6=Hordijk |first6=Iris |last7=Ma |first7=Haozhi |last8=Majumder |first8=Sabiha |last9=Manoli |first9=Gabriele |last10=Maschler |first10=Julia |last11=Mo |first11=Lidong |last12=Routh |first12=Devin |last13=Yu |first13=Kailiang |last14=Zohner |first14=Constantin M. |last15=Thomas W. |first15=Crowther |title=Understanding climate change from a global analysis of city analogues |journal=PLOS ONE |date=10 July 2019 |volume=14 |issue=7 |at=S2 Table. Summary statistics of the global analysis of city analogues. |doi=10.1371/journal.pone.0217592 |pmid=31291249 |pmc=6619606 |bibcode=2019PLoSO..1417592B |doi-access=free }}</ref><ref>{{cite web |url=https://crowtherlab.pageflow.io/cities-of-the-future-visualizing-climate-change-to-inspire-action |title=Cities of the future: visualizing climate change to inspire action |at=Current vs. future cities |access-date=8 January 2023 |archive-date=8 January 2023 |archive-url=https://web.archive.org/web/20230108082440/https://crowtherlab.pageflow.io/cities-of-the-future-visualizing-climate-change-to-inspire-action |url-status=dead }}</ref> According to [[Climate Action Tracker]], the current warming trajectory appears consistent with {{convert|2.7|C-change|F-change}}, which closely matches [[Representative Concentration Pathway]] (RCP)&nbsp;4.5.<ref>{{cite web |url=https://climateactiontracker.org/global/cat-thermometer/ |title=The CAT Thermometer |access-date=8 January 2023 |archive-date=14 April 2019 |archive-url=https://web.archive.org/web/20190414131223/https://climateactiontracker.org/global/cat-thermometer/ |url-status=live }}</ref>

Moreover, according to the 2022 [[IPCC Sixth Assessment Report]], Algiers is one of 12 major African cities ([[Abidjan]], [[Alexandria]], Algiers, [[Cape Town]], [[Casablanca]], [[Dakar]], [[Dar es Salaam]], [[Durban]], [[Lagos]], [[Lomé]], [[Luanda]] and [[Maputo]]) which would be the most severely affected by the future [[sea level rise]]. It estimates that they would collectively sustain cumulative damages of U$65&nbsp;billion under RCP&nbsp;4.5 and US$86.5&nbsp;billion for the high-emission scenario RCP 8.5 by the year 2050. Additionally, RCP&nbsp;8.5 combined with the hypothetical impact from [[marine ice sheet instability]] at high levels of warming would involve up to US$137.5 billion in damages, while the additional accounting for the "low-probability, high-damage events" may increase aggregate risks to $187 billion for the "moderate" RCP&nbsp;4.5, $206&nbsp;billion for RCP&nbsp;8.5 and $397&nbsp;billion under the high-end ice sheet instability scenario.<ref name="AR6Ch9"/> Since sea level rise would continue for about 10,000 years under every scenario of climate change, future costs of sea level rise would only increase, especially without adaptation measures.<ref>{{cite book |url=https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf |title=Technical Summary. In: Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change |date=August 2021 |publisher=IPCC |page=TS14 |access-date=12 November 2021 |archive-date=9 August 2021 |archive-url=https://web.archive.org/web/20210809080054/https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf |url-status=live }}</ref> The Casbah is on a list of 10 African [[World Heritage Site]] most threatened by sea level rise.<ref name="AR6Ch9">Trisos, C.H., I.O. Adelekan, E. Totin, A. Ayanlade, J. Efitre, A. Gemeda, K. Kalaba, C. Lennard, C. Masao, Y. Mgaya, G. Ngaruiya, D. Olago, N.P. Simpson, and S. Zakieldeen 2022: [https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_Chapter09.pdf Chapter 9: Africa] {{Webarchive|url=https://web.archive.org/web/20221206082533/https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_Chapter09.pdf |date=2022-12-06 }}. In [https://www.ipcc.ch/report/ar6/wg2/ Climate Change 2022: Impacts, Adaptation and Vulnerability] {{Webarchive|url=https://web.archive.org/web/20220228114918/https://www.ipcc.ch/report/ar6/wg2/ |date=2022-02-28 }} [H.-O. Pörtner, D.C. Roberts, M. Tignor, E.S. Poloczanska, K. Mintenbeck, A. Alegría, M. Craig, S. Langsdorf, S. Löschke, V. Möller, A. Okem, B. Rama (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, USA, pp. 2043–2121</ref>