祁连山中东部青海云杉径向生长对气候变暖的响应差异
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Different responses of radial growth of Picea crassifolia to climate warming in the middle and eastern Qilian Mountains
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图5. STD年表与前一年6月至当年9月的月平均气温(a)、月总降水(b)、月平均最高气温(c)、月平均最低气温(d)和scPDSI(e)的相关分析(左)、一阶差相关分析(右),时间跨度为1959—2015年,P(Previous)表示前一年,C(Current)表示当年;右侧图例表示图中颜色所对应的相关系数值,红色越深表示正相关关系越强,蓝色越深表示负相关关系越强。“+”表示正相关超过95%的置信限,“-”表示负相关超过95%的置信限 |
Fig. 5. The correlation coefficients(left) and the first-order difference correlation coefficients(right)between the regional standard chronology and monthly mean temperature (a), monthly total precipitation (b), monthly meanmaximuntemperature (c), monthly mean minimum temperature (d) and scPDSI (e) from previous June to current September over the period1959—2015. P:previous year,C:current year. The different color represent the correlation value, the darker the red, the stronger the positive correlation, and the darker the blue, the stronger the negative correlation. The “+”(“-”)indicates that the positive(negative) correlation exceeds a 95% confidence limit |
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