Langley and RADIATIVE energy research
Not radiation (at least not nuclear).
A few moments of research found me the Nasa Langley website. Their press release archive server is down, but following links to their Earth Science pages which specialise in radiative studies led me to the following full-text article.
If I got all the html right, that should help you all follow my tracks.
Reading the article, the anomalies they speak of (1-5 W/m^2) are at the single percentage level compared to the full intensity of solar radiation (1,350 W/m^2).
Still worth studying, but not worth panicking. :-|