{"id":363287,"date":"2025-01-25T09:14:30","date_gmt":"2025-01-25T08:14:30","guid":{"rendered":"https:\/\/climatescience.press\/?p=363287"},"modified":"2025-01-25T09:14:32","modified_gmt":"2025-01-25T08:14:32","slug":"central-japan-was-3c-and-up-to-7c-warmer-than-today-throughout-the-early-to-mid-holocene","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=363287","title":{"rendered":"Central Japan Was 3\u00b0C (And Up To 7\u00b0C) Warmer Than Today Throughout the Early to Mid-Holocene"},"content":{"rendered":"\n
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From NoTrickZone<\/a><\/p>\n\n\n\n

By\u00a0Kenneth Richard<\/a><\/em><\/p>\n\n\n\n

\u201cBased on the records of the\u00a0\u03b4\u00b9\u2078O\u00a0stalagmite, the [Holocene Thermal Maximum] occurred between 10.9 and 6.7 ka [Honshu, Japan], reaching its peak temperature (15.0\u00b0C) around 7.0 ka. At this time, temperatures were approximately 3\u00b0C warmer than present.\u201d \u2013 Murata et al., 2025<\/strong><\/p>\n\n\n\n

In a new study<\/a><\/strong>, scientists have used oxygen and carbonate isotope proxy evidence to determine millennia of temperature variations at Kiriana Cave in central Japan.<\/p>\n\n\n\n

Today, the average temperature at Kiriana Cave \u201ccan be estimated at 11.8\u00b0C.\u201d But from 13.7 ka (thousand years before 1950) to 12.4 ka, when CO2 was still only about 250 ppm, the \u201ccalculated temperature\u2026ranges from 11.5\u00b0C to 15.0\u00b0C,\u201d peaking at more than 3\u00b0C warmer than today.<\/p>\n\n\n\n

Furthermore, the rate of warming reached 1\u00b0C per century in this region, as temperatures rose from \u201caround 12\u00b0C until 12.9 ka and then increased to ~15\u00b0C at 12.6 ka.\u201d Over the next 200 years temperatures fell by 2.2\u00b0C, or from 15\u00b0C at 12.6 ka to 12.8\u00b0C by 12.4 ka.<\/p>\n\n\n\n

The scientists also point out the Maboroshi Cave near Hiroshima had Mid-Holocene temperatures ranging \u201cfrom 21\u00b0C to 15\u00b0C, clearly warmer than the present temperature (14.1\u00b0C) by 7\u00b0C \u2212 1\u00b0C.\u201d<\/p>\n\n\n\n

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Image Source:\u00a0Murata et al., 2025<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n

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