In the original version of the article, the wrong image was supplied for Fig. 4. This error has now been corrected in the PDF and HTML versions of this article.

中文翻译：

---

作者更正：北美各地天气类型频率的趋势

在文章的原始版本中，为图4提供了错误的图像。此错误已在本文的PDF和HTML版本中得到纠正。