Occasionally, manuscripts need some extra help with English language usage. While it is great when a reviewer takes on the task of copyediting a manuscript, the main request on reviewers is an assessment of the science in the paper, not the grammar, diction, and spelling. As Editor, I sometimes return a paper for English corrections before I will send it out for review. I often just mark up the first couple pages of the manuscript, hoping that the authors see the problems and make similar corrections throughout the rest of the paper. Or, even better, the authors should get a native-English-speaking colleague to proofread the text. Yet another option is to use a technical editing service. AGU used to have a list of such services, but now just lists one: American Journal Experts (AJE). Why the change? Because AGU and AJE have struck a deal so that potential authors to AGU journals can get a 20% discount on AJE services. Details are found here
Here is the direct link to the AJE-for-AGU site: http://www.aje.com/go/agumembers/
For a typical JGR Space Physics manuscript in the 5000-10000 word range, their “standard service” costs between $250 and $400. With it, you get an “editing certificate” that verifies to the journal that the manuscript has been edited by a native English speaker and that it is ready for submission. AGU selected AJE for this deal because the AGU Pubs staff and Pubs Committee believe that AJE offers a high quality service at a fair price. This is a small cost compared to the publication fee and I hope that those authors that are unsure about their English usage will opt to use this (or another) service to make the manuscript as clear and readable as possible.
AJE also does illustration formatting to ensure readability, clarity, and compliance with journal specifications, again at the 20% discounted price (if you go through the AGU link).