Ongoing non-existence of global warming is expected to last for a total of 20-35 years, peer reviewed study, Science Magazine-BBC

.
Peer reviewed study published in Science finds ongoing global warming "pause" could last until 2034 which would be 35 years of no warming. Per BBC and NOAA, current pause began in 1999.

8/22/14, "We found that the slowdown is mainly caused by heat transported to deeper layers in the Atlantic and the Southern oceans, initiated by a recurrent salinity anomaly in the subpolar North Atlantic. Cooling periods associated with the latter deeper heat-sequestration mechanism historically lasted 20 to 35 years."...

Source:

8/22/14, "Varying planetary heat sink led to global-warming slowdown and acceleration," sciencemag.org 
Xianyao Chen¹,², Ka-Kit Tung²,*

============================

NOAA source: In 1999 NOAA said 1998 global temperatures were highest in 119 years of reliable records. Of US temperatures, NOAA said 1998 was second highest since 1934 per US records dating from 1895:
.
1/11/1999, "1998 WARMEST YEAR ON RECORD, NOAA ANNOUNCES," publicaffairs.noaa.gov/releases99

"Global temperatures in 1998 were the warmest in the past 119 years, since reliable instrument records began, the Commerce Department's National Oceanic and Atmospheric Administration announced today....

The United States average temperature in 1998 was 54.62°F (12.57°C), which placed the year in a virtual tie with1934 as the warmest year in records dating to1895. The average temperature in 1934 was 54.67°F (12.59°C) and the third warmest year on record was 1921 with an average of 54.42°F (12.46°C)....

Global Precipitation

The 1998 global average precipitation anomaly for the land surface was less than 0.1 inches (2.5 mm) above the 1900-1997 mean. However, considerable differences were evident in precipitation departures across latitude bands with an average surplus of precipitation in the majority of the Northern Hemisphere, and a deficit elsewhere."...

"The 1998 statistics are available at: http://www.ncdc.noaa.gov/ol/climate/research/1998/ann/ann98.html"

======================== 

BBC source for NOAA citation: 
 
8/21/14, "Global warming slowdown 'could last another decade'," BBC, Matt McGrath

"Scientists have struggled to explain the so-called pause that began in 1999, despite ever increasing levels of CO2 in the atmosphere.

The latest theory says that a naturally occurring 30-year cycle in the Atlantic Ocean is behind the slowdown....

The world's overall temperatures haven't risen beyond the record set in 1998....[subhead, 'Ice age fears']

 .