1. Department of Atmospheric, Oceanic and Space Sciences; University of Michigan; Ann Arbor Michigan USA
2. Department of Atmospheric Sciences; Texas A&M University; College Station Texas USA
3. Department of Oceanography; Texas A&M University; College Station Texas USA
4. Microscopy and Imaging Center; Texas A&M University; College Station Texas USA
5. Palynology Laboratory; Texas A&M University; College Station Texas USA