Pollen Trap Records

Flagging non-climatic noise in lacustrine archives

A four-year monthly sediment trap collection that can be used to calibrate water-level noise in pollen-based paleoclimate reconstructions.

Luyuan, Zhang · Li, Jie · Zou, Yafei · Li, Jingjing · Xu, Huiming · Longyun, Yin · Xi, Dangpeng

Review of Palaeobotany and Palynology 2026

Specifications

Pollen sampling duration

{'zh': '4', 'en': '4'} 年

Spring woody pollen percentage peak timing

{'zh': '3-4', 'en': '3-4'} 月

First appearance timing difference for Alnus and Artemisia pollen

{'zh': '1', 'en': '1'} 年

Advantages

Distinguishes water-level noise

Pollen records during slow water-level rise correlate with climate, whereas during decline they are dominated by non-climatic factors, allowing direct identification of water-level noise.

Reveals modern analog bias

Water-level decline exposes gentle lake slopes and increases terrigenous input, causing herbs and Cyperaceae to surge and woody pollen to drop, deviating from actual vegetation and cautioning against uncritical use of modern analogs.

Provides continuous monitoring template

Four-year monthly sediment trap sampling covers both rising and falling water levels, suitable for calibrating pollen response to water-level changes and offering a transferable sampling protocol for other lakes.

Applications

• quantitative paleoclimate reconstruction：Provides direct evidence for distinguishing non-climatic noise, preventing water-level fluctuations from being misinterpreted as climate change.
• modern pollen monitoring：Reveals how water-level changes alter lake pollen deposition, informing calibration of modern pollen-climate relationships.
• lake sediment core calibration：Uses pollen records with known water-level history to help correct water-level noise in sediment cores.