Fig. 2
From: Rapid termination of the African Humid Period triggered by northern high-latitude cooling
Moisture sources for southern Cameroon and northern East Africa. a–d FLEXPART84, 85 backward analyses of air mass trajectory for the period 1980–2015 at 0.25° resolution. The boxed region in southern Cameroon (9° E-14° E and 1° N-6° N) represents the estimated leaf-wax source region for Gulf of Guinea core GeoB4905-4. Colours represent the sources of moisture for the boxed region and show where E-P > 0 (mm day−1). e–h Forward runs of FLEXPART for the southeast Atlantic moisture source (outlined with a red dashed line). Colours show precipitation derived from this moisture source (mm day−1). Numbers indicate total seasonal precipitation amount (mm) from this moisture-source delivered to the boxed regions in southern Cameroon and northern East Africa. The boxed region in northern East Africa represents the leaf-wax source region for the Gulf of Aden core P178-15P, estimated as 40° E-46° E and 7° N-14° N. i–l As e–h but for the Sahel-Sahara moisture source (9° E–50° E and 6° N–20° N; marked with a red dashed rectangle). a, e, i represent Dec–Jan–Feb (DJF), b, f, j represent Mar–Apr–May (MAM), c, g, k represent Jun–Jul–Aug (JJA) and d, h, l represent Sep–Oct–Nov (SON)
