Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2015 May 6;6:309. doi: 10.3389/fpls.2015.00309

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2015 Wu, Liu, Chen, Xu, Wang, Zeng and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

Correlation coefficients (Pearson's r) between the δ¹³C residuals chronology and the climate variables from 1960 to 2010 at (A) Site A1 (2700 m a.s.l.), (B) Site A2 (2400 m a.s.l.), and (C) Site A3 (2200 m a.s.l.). Horizontal dashed lines represent the 95% confidence interval. T_mean, mean monthly temperature; T_min, minimum monthly temperature; T_max, maximum monthly temperature; PRE, total precipitation; SPEI, standardized precipitation evapotranspiration index. AMJJA represents the mean value from April to August.