{"id":264635,"date":"2023-06-30T12:28:38","date_gmt":"2023-06-30T10:28:38","guid":{"rendered":"https:\/\/climatescience.press\/?p=264635"},"modified":"2023-06-30T12:28:41","modified_gmt":"2023-06-30T10:28:41","slug":"new-study-finds-the-early-mid-holocene-sahara-had-lakes-with-depths-of-at-least-300-meters","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=264635","title":{"rendered":"New Study Finds The Early-Mid Holocene Sahara Had Lakes With Depths Of \u2018At Least 300 Meters\u2019"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"482\" data-attachment-id=\"264642\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=264642\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?fit=1200%2C800&amp;ssl=1\" data-orig-size=\"1200,800\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0lake-ajous-t15b_8528b-kroepelin\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?fit=723%2C482&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?resize=723%2C482&#038;ssl=1\" alt=\"\" class=\"wp-image-264642\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?resize=1024%2C683&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0lake-ajous-t15b_8528b-kroepelin.jpg?w=1200&amp;ssl=1 1200w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From <a href=\"https:\/\/notrickszone.com\/\">NoTricksZone<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>By\u00a0<a href=\"https:\/\/notrickszone.com\/author\/kenneth-richard\/\">Kenneth Richard<\/a>\u00a0on\u00a0<\/em>29. June 2023<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"407\" data-attachment-id=\"264644\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=264644\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?fit=1024%2C576&amp;ssl=1\" data-orig-size=\"1024,576\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"0d132196f7e90374051a58eaace36e073-1024&amp;#215;576-1\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?fit=723%2C407&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?resize=723%2C407&#038;ssl=1\" alt=\"\" class=\"wp-image-264644\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?w=1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?resize=768%2C432&amp;ssl=1 768w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em><mark style=\"background-color:rgba(0, 0, 0, 0);color:#e81515\" class=\"has-inline-color\">\u201cDuring the Holocene, African tropical and subtropical areas experienced extreme climatic variations.\u201d \u2013 Yacoub et al., 2023<\/mark><\/em><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From ~10,000 to 5000 years ago the modern hyperarid central Sahara was green and teeming with an abundance of lakes, tropical trees, grasslands, and animal species.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The central Sahara\u2019s lake depths were in some cases (the Trou at Natron) \u201cat least 300 m\u201d high (<strong><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0277379123001476\">Yacoub et al., 2023<\/a><\/strong>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Then, ~5000 years ago, the Sahara abruptly (within centuries) became hyperarid, lifeless. The transition has been attributed to falling insolation (i.e., cooling) and associated decreases in precipitation and a dramatic shift in the monsoonal rainfall belt.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"453\" data-attachment-id=\"264637\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=264637\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?fit=1275%2C798&amp;ssl=1\" data-orig-size=\"1275,798\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?fit=723%2C453&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?resize=723%2C453&#038;ssl=1\" alt=\"\" class=\"wp-image-264637\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?resize=1024%2C641&amp;ssl=1 1024w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?resize=300%2C188&amp;ssl=1 300w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?resize=768%2C481&amp;ssl=1 768w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?resize=1200%2C751&amp;ssl=1 1200w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Holocene-Green-Sahara-period-had-300-m-deep-lakes-before-abrupt-superarification-Yacoub-2023.jpg?w=1275&amp;ssl=1 1275w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Image Source:\u00a0<strong><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0277379123001476\">Yacoub et al., 2023<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It should be noted that the transition from the hyperarid Saharan (desert) conditions during the late last glacial (8500 B.C.E., or about 10,500 years ago) to the much warmer, green, lake-covered Holocene Sahara also took \u201conly a few centuries\u201d (<strong><a href=\"https:\/\/www.science.org\/doi\/10.1126\/science.1130989\">Kuper and Kropelin, 2006<\/a><\/strong>).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"734\" data-attachment-id=\"264638\" data-permalink=\"https:\/\/climatescience.press\/?attachment_id=264638\" data-orig-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago.jpg?fit=761%2C773&amp;ssl=1\" data-orig-size=\"761,773\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago.jpg?fit=723%2C734&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago.jpg?resize=723%2C734&#038;ssl=1\" alt=\"\" class=\"wp-image-264638\" srcset=\"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago.jpg?w=761&amp;ssl=1 761w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago.jpg?resize=295%2C300&amp;ssl=1 295w, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0Abrupt-greening-and-dessication-of-the-Sahara-10500-to-5000-years-ago.jpg?resize=60%2C60&amp;ssl=1 60w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Image Source:\u00a0<strong><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0277379123001476\">Yacoub et al., 2023<\/a><\/strong>,\u00a0<strong><a href=\"https:\/\/www.science.org\/doi\/10.1126\/science.1130989\">Kuper and Kropelin, 2006<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/climatescience.press\/wp-content\/uploads\/2023\/06\/kuper.som_.rev_.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of kuper.som_.rev_.\"><\/object><a id=\"wp-block-file--media-046f0f6d-1176-47dd-973a-12c2feeeb371\" href=\"https:\/\/climatescience.press\/wp-content\/uploads\/2023\/06\/kuper.som_.rev_.pdf\">kuper.som_.rev_<\/a><a href=\"https:\/\/climatescience.press\/wp-content\/uploads\/2023\/06\/kuper.som_.rev_.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-046f0f6d-1176-47dd-973a-12c2feeeb371\">Herunterladen<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201cDuring the Holocene, African tropical and subtropical areas experienced extreme climatic variations.\u201d \u2013 Yacoub et al., 2023<\/p>\n","protected":false},"author":121246920,"featured_media":264644,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":{"0":"post-264635","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","6":"hentry","7":"category-uncategorized","9":"fallback-thumbnail"},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2023\/06\/0d132196f7e90374051a58eaace36e073-1024x576-1.jpg?fit=1024%2C576&ssl=1","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paxLW1-16Qj","jetpack-related-posts":[{"id":305119,"url":"https:\/\/climatescience.press\/?p=305119","url_meta":{"origin":264635,"position":0},"title":"\u00a0The Elevation Of The Early Holocene\u2019s W. Antarctic Ice Sheet Once Plunged 480 Meters In 200 Years","author":"uwe.roland.gross","date":"27\/02\/2024","format":false,"excerpt":"Retreat rates for the West Antarctic Ice Sheet (WAIS) were massive during the Early Holocene, when CO2 concentrations were low and stable (~265 ppm), dwarfing any retreat rates witnessed in the modern era.","rel":"","context":"In \"abrupt ice loss\"","block_context":{"text":"abrupt ice loss","link":"https:\/\/climatescience.press\/?tag=abrupt-ice-loss"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/01CLIMATE2-superJumbo.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/01CLIMATE2-superJumbo.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/01CLIMATE2-superJumbo.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/01CLIMATE2-superJumbo.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/01CLIMATE2-superJumbo.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":302002,"url":"https:\/\/climatescience.press\/?p=302002","url_meta":{"origin":264635,"position":1},"title":"New Study: Denmark Coast Has Been Expanding Seaward At A Rate Of +1.4 Meters Per Year Since 1900","author":"uwe.roland.gross","date":"16\/02\/2024","format":false,"excerpt":"Scientists have found evidence that the coastal land area grew (prograded) by 120 meters from 1900 to 1985 at a study site in central Denmark.\u00a0","rel":"","context":"In \"coastal land area\"","block_context":{"text":"coastal land area","link":"https:\/\/climatescience.press\/?tag=coastal-land-area"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Denmark-Coast.jpeg?fit=1200%2C798&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Denmark-Coast.jpeg?fit=1200%2C798&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Denmark-Coast.jpeg?fit=1200%2C798&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Denmark-Coast.jpeg?fit=1200%2C798&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2024\/02\/0-Denmark-Coast.jpeg?fit=1200%2C798&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":364128,"url":"https:\/\/climatescience.press\/?p=364128","url_meta":{"origin":264635,"position":2},"title":"The Evidence Clearly Shows Sea Levels Were Meters Higher Than Today A Few Millennia Ago","author":"uwe.roland.gross","date":"31\/01\/2025","format":false,"excerpt":"Fifteen more new studies published in 2024 document meters-higher sea levels across the world during the Mid-Holocene, when CO2 hovered near 260 ppm.","rel":"","context":"In \"7000 to 4000 years ago\"","block_context":{"text":"7000 to 4000 years ago","link":"https:\/\/climatescience.press\/?tag=7000-to-4000-years-ago"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/01-s2.0-S0277379124003433-ga1_lrg.jpg?fit=1200%2C815&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/01-s2.0-S0277379124003433-ga1_lrg.jpg?fit=1200%2C815&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/climatescience.press\/wp-content\/uploads\/2025\/01\/01-s2.0-S0277379124003433-ga1_lrg.jpg?fit=1200%2C815&ssl=1&resize=525%2C300 1.5x, 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