# Publications

## Contents

## Some Often (by the standards of our field) Requested Publications

**High-End Climate Science: Development of Modeling and Related Computing Capabilities**

This report was written for the Office of Science and Technology Policy in 2000. It's an analysis and strategy for organizing climate modeling in the U.S. Some consider it a "computing report," but that's not all the authors intended. The report discusses the fragmentation of U.S. climate modeling resources, the need for an integrating software infrastructure, and the relationship of climate modeling to high performance computing.

**1987 Reviews of Geophysics Advection Review**

Because people still ask for it. This is an introduction to modeling advection of atmospheric tracers. It contributed prominently to my career and the development of a dynamical core with S.J. Lin. It gives some the impression that I am an "expert" on numerical techniques. I am not.

## Recent Publications

Climate projections and their impact on policy and practice Maria Carmen Lemos and Richard B. Rood, Wiley Interdisciplinary Reviews: Climate Change, 2010. This paper discusses what we call the uncertainty fallacy: namely, the idea that the reduction of uncertainty is what keeps us from doing something about climate change.

Don't "Sell Short" the Earth:Carbon tax will ease transition to sensible climate policy Rood and Thoumi, mongabay.com feature article, 2008.

Simulated Climate near Steep Topography: Sensitivity to Numerical Methods for Atmospheric Transport Bala *et al.*, *Geophys. Res. Lett.*, 2008.

Evaluation of a CCSM3 Simulation with a Finite Volume Dynamical Core for the Atmosphere at 1° Latitude by 1.25° Longitude Resolution Bala *et al.*, *J. Climate*, 2008.

## Book Chapters

I am in that phase of my career where I get to write chapters in books. My approach is with the perspective I have as both a scientist and a manager of scientists. I think about systems as a whole; hence, how does what I write about fit into the whole.

### Data Assimilation: Making sense of observations

Here are two chapters from the book Data Assimilation: Making sense of observations, Eds. W.A. Lahoz, B. Khattatov and R. Ménard, Springer, 2010. Here is the link to the book at the Springer Web Site. There is good material in the book. If you buy it Springer will be happy, but we authors don't make money. That's not a complaint, just a disclaimer.

Of course, I do have a take on these subjects. These chapters discuss why reanalysis data sets are NOT physically consistent, and the challenges of achieving physical consistency. There is also a discussion on the use of assimilated data sets in trend analysis. I am a big advocate of reanalysis data sets, and the scientific investigation of reanalysis. These chapters focus on some issues that must be addressed to make them more useful in climate applications.

Rood, R. B. and M. G. Bosilovich , 2010: Reanalysis: Data Assimilation for Scientific Investigation of Climate --Reanalysis Chapter

Rood, R. B., 2010: The Role of the Model in the Data Assimilation System --Modeling Chapter

### Numerical Techniques for Global Atmospheric Models

(Lecture Notes in Computational Science and Engineering)

This is the working title for a book that came from an Advanced Study Program Colloquium / Summer School. The editors Christiane Jablonowski and Peter Lauritzen asked and allowed me to write a perspective on the role of the dynamical core in models. Honestly, my view is - as a field we become a little too wrapped up in numerical methods and grids and the quest for "best." I view it a little like cooking - there is more than one way to cook a pig. (This is a reference to a publication I have on BBQ .... It was, in fact, removed from the chapter itself.) The dynamical core is just another important part of the model and we need to think a LOT more about how the pieces fit together.

Rood, R. B., 2010: A Perspective on the Role of the Dynamical Core in the Development of Weather and Climate Models
Richard B. Rood --Dynamical Core Perspective

## Lin-Rood Dynamical Core

This dynamical core, often called Lin-Rood or Finite Volume or, just, FV has been widely used. Someday it will just be called the Lin Core. It consists of a horizontal advection scheme, a treatment of the pressure gradient term, and a Lagrangian vertical coordinate. Here they all are:

Multi-Dimensional Flux-Form Semi-Lagrangian Transport Schemes Lin and Rood, *Mon. Wea. Rev.*, 1996. This is the advection scheme for tracers. This includes the "requirements" for a physically based scheme.

An explicit flux-form semi-Lagrangian shallow-water model on the sphere Lin and Rood, *Q. J. Roy. Meteor. Soc.*, 1997. This paper takes the advection scheme to be a dynamical core.

A finite-volume integration scheme for computing pressure gradient force in general vertical coordinates Lin, *Q. J. Roy. Meteor. Soc.*, 1997. This is the finite-volume treatment of pressure gradient, which has a big impact near steep topography.

A ‘‘Vertically Lagrangian’’ Finite-Volume Dynamical Core for Global Models Lin, *Mon. Wea. Rev.*, 2004. This is THE reference for the dynamical core.

## Blogs and Resume (Again)

I put a lot of work into the blogs and lots of interesting things have come from them.

Wunderground.com Updated, at least, weekly. Physical climate, impacts, an occasional opinion piece, sometimes a bit of news.

American Meteorology Society (climatepolicy.org) This is not just me, a bunch of people.