Walagan - CNWLG001
Wang, Xiaochun ; Yao, Qichao; Zhang, Lei; Lu, Yongxian; Zhao Zhikui

Dating method: crossdated

Sample storage location: College of Forestry, Northeast Forestry University, Harbin, Heilongjiang, 150043, China

Reference:
Qichao Yao, Peter Brown, Shirong Liu, Monique Rocca, Valerie Trouet, Ben Zheng, Haonan Chen, Yinchao Li, Duanyang Liu, and Xiaochun Wang 2017. Pacific-Atlantic Ocean influence on wildfires in northeast China (1774 to 2010). Geophysical Research Letters. DOI 10.1002/2016GL071821. 

Abstract: 
Identification of effects that climate teleconnections, such as El Niño–Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO), and North Atlantic Oscillation (NAO), have on wildfires is difficult because of short and incomplete records in many areas of the world. We developed the first multicentury wildfire chronologies for northeast China from fire-scarred trees. Regional wildfires occurred every 7years from the 1700s to 1947, after which fire suppression policies were implemented. Regional wildfires occurred predominately during drought years and were associated with positive phases of ENSO and PDO and negative NAO. Twentieth century meteorological records show that this contingent combination of +ENSO/+PDO/-NAO is linked to low humidity, low precipitation, and high temperature during or before late spring fire seasons. Climate and wildfires in northeast China may be predictable based on teleconnection phases, although future wildfires may be more severe due to effects of climate change and the legacy of fire suppression.

NOAA/IMPD web landing page for this fire history site is available at:
http://ncdc.noaa.gov/paleo/study/21131

NOAA/IMPD DIF metadata record for this fire history site is available at:
http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-fire-21131.xml

FHX filename: cnwlg001.txt

IMPD code: CNWLG001

Name of site: Walagan

Site code: 

Contributors: Wang, Xiaochun ; Yao, Qichao; Zhang, Lei; Lu, Yongxian; Zhao Zhikui

Latitude: 53.007778 (WGS84)

Longitude: 124.866667 (WGS84)

Mean elevation: 810 (meters)

Country: China

State: Heilongjiang 

Region: Daxing' an Mountain

First year: 1773 AD

Last year: 2007 AD

Species name: Larix gmelinii [LAGM]

Funding agency names and grant numbers: 
This research was supported by the National Natural Science Foundation of China (grant nos. 30970481 and 41471171),

Comments:
Yao fire data from Walagan, Daxing'an Mountain, Heilongjiang, China - IMPD CNWLG001
https://www.ncdc.noaa.gov/paleo/study/21131

Fire History Graphs: Fire History Graphs illustrate specific years when fires occurred and how many trees were scarred. They are available in both PDF and PNG formats. The graphs consist of 2 parts, both of which show the X axis (time line) at the bottom with the earliest year of information on the left and the latest on the right. The Fire Index Plot is the topmost plot, and shows two variables: sample depth (the number of recording trees in each year) as a blue line along the left Y axis, compared with the percent trees scarred shown as gray bars along the right Y axis. Below, the Fire Chronology Plot consists of horizontal lines representing injuries by year on individual sampled trees. Symbols are overlain that denote the years containing the dendrochronologically-dated fire scars or injuries. The sample ID of each tree is displayed to the right of each line. The Composite Axis below represents the composite information from all individual series. The symbols used to represent the fire scars or injuries, and the filters used to determine the composite information, are shown in the legend. These graphs were created using the Fire History Analysis and Exploration System (FHAES). See http://www.fhaes.org for more information.