@article {Govil2016453, title = {Holocene climate variability from the lake sediment core in Schirmacher Oasis region, East Antarctica: Multiproxy approach}, journal = {Quaternary International}, volume = {425}, year = {2016}, pages = {453 - 463}, abstract = {Abstract A 1.62~m sediment core was retrieved from one of the landlocked freshwater lakes (L-6) in the Schirmacher Oasis (SO), East Antarctica during the 24th Indian Antarctic Expedition (2004{\textendash}2006). The sediment core samples were analyzed for Total Organic Carbon (TOC), Biogenic Silica (BSi), grain size and elemental concentration ratios (Mg/Ca and Mn/Fe). The sediment core represents the time period of last \~{}11.6~cal ka \{BP\} as ascertained by \{AMS\} 14C radiocarbon dates. The sedimentation accumulation rate variation of \~{}13.6~cm/ka from \~{}11.6 to \~{}10~cal ka \{BP\} reveals a warm phase followed by a low sedimentation accumulation rate of \~{}2.9~cm/ka from \~{}10~ka \{BP\} to \~{}3.1~ka BP, indicating a cold period in the region. The sedimentation accumulation rate again increased from \~{}3.1~cal ka \{BP\} to recent with a maximum of \~{}88~cm/ka which reveals the initiation of glacier retreat or ice-free conditions in the study area. The Total Organic Carbon (TOC) is \<2\% from \~{}10 to \~{}3.1~cal ka \{BP\} indicating a prolonged colder phase in the study area. However, elevated TOC, \{BSi\} and Mg/Ca ratio since \~{}3.1~cal ka \{BP\} to recent points indicates towards ice-free conditions (continental ice sheet retreat) and subsequently high productivity in the region. Moreover, the productivity was higher at the Pleistocene{\textendash}Holocene boundary as evidenced by the Mg/CA, Mn/Fe ratio and Biogenic Silica (BSi). The present study identified a colder phase (or re-advancement of continental ice sheet) during the early to mid-Holocene and initiation of ice-free or continental ice-sheet retreat during the late Holocene and their implications on the productivity changes.}, keywords = {Freshwater lakes}, issn = {1040-6182}, doi = {http://doi.org/10.1016/j.quaint.2016.09.032}, url = {http://www.sciencedirect.com/science/article/pii/S1040618216304293}, author = {Pawan Govil and Abhijit Mazumder and Rajesh Asthana and Anoop Tiwari and Ravi Mishra} }