% This file contains a station summary listing for a temperature % station in the Berkeley Earth database. This station is identified as: % % Berkeley ID#: 171226 % Primary Name: GREER ARIZONA % Record Type: TAVG % Country: United States % State: AZ % Latitude: 34.06000 +/- 0.00500 % Longitude: -109.45000 +/- 0.00500 % Elevation (m): 2499.40 +/- 0.50 % # of Months: 250 % % IDs: ghcnd - USR0000AGRE % % Sources: Global Historical Climatology Network - Daily % % Site Hash: 1e7934ed4fb6466594db3e0d61eb4f6f % Raw Data Hash: 379e3cf16982b6c289f38cfd4226e959 % Adj Data Hash: 937c999b4b8b983cbd606193aa2bf8c1 % % The data for this station is presented below in several columns and in % several forms. The temperature values are reported as "raw", % "adjusted", and "regional expectation". % % The "raw" values reflect the observations as originally ingested by % the Berkeley Earth system from one or more originating archive(s). % These "raw" values may reflect the merger of more than one temperature % time series if multiple archives reported values for this location. % Alongside the raw data we have also provided a flag indicating which % values failed initial quality control checks. A further column % dates at which the raw data may be subject to continuity "breaks" % due to documented station moves (denoted "1"), prolonged measurement % gaps (denoted "2"), documented time of observation changes (denoted "3") % and other empirically determined inhomogeneities (denoted "4"). % % In many cases, raw temperature data contains a number of artifacts, % caused by issues such as typographical errors, instrumentation changes, % station moves, and urban or agricultural development near the station. % The Berkeley Earth analysis process attempts to identify and estimate % the impact of various kinds of data quality problems by comparing each % time series to neighboring series. At the end of the analysis process, % the "adjusted" data is created as an estimate of what the weather at % this location might have looked like after removing apparent biases. % This "adjusted" data will generally to be free from quality control % issues and be regionally homogeneous. Some users may find this % "adjusted" data that attempts to remove apparent biases more % suitable for their needs, while other users may prefer to work % with raw values. % % Lastly, we have provided a "regional expectation" time series, based % on the Berkeley Earth expected temperatures in the neighborhood of the % station. This incorporates information from as many weather stations as % are available for the local region surrounding this location. Note % that the regional expectation may be a systematically a bit warmer or % colder than the weather stations by a few degrees due to differences % in mean elevation and other local characteristics. % % For each temperature time series, we have also included an "anomaly" % time series that removes both the seasonality and the long-term mean. % These anomalies may provide an easier way of seeing changes through % time. % % Reported temperatures are in Celsius and reflect monthly averages. As % these files are intended to be summaries for convenience, additional % information, including more detailed flagging and metadata, may be % available in our whole data set files. % % The Berkeley Earth analysis was run on 15-Nov-2013 19:55:48 % % Raw Data QC Continuity Adjusted Data Regional Expectation % Year, Month, Temperature, Anomaly, Failed, Breaks, Temperature, Anomaly, Temperature, Anomaly 1991 12 NaN NaN NaN NaN NaN NaN -0.480 0.458 1992 1 NaN NaN NaN NaN NaN NaN -3.535 -2.144 1992 2 NaN NaN NaN NaN NaN NaN 2.016 1.127 1992 3 NaN NaN NaN NaN NaN NaN 4.433 0.568 1992 4 NaN NaN NaN NaN NaN NaN 10.415 2.518 1992 5 NaN NaN NaN NaN NaN NaN 12.809 0.116 1992 6 NaN NaN NaN NaN NaN NaN 16.750 -1.251 1992 7 NaN NaN NaN NaN NaN NaN 19.865 -1.164 1992 8 NaN NaN NaN NaN NaN NaN 18.733 -0.847 1992 9 NaN NaN NaN NaN NaN NaN 16.716 0.544 1992 10 NaN NaN NaN NaN NaN NaN 11.618 1.528 1992 11 NaN NaN NaN NaN NaN NaN 0.707 -2.747 1992 12 -1.437 1.105 1 0 NaN NaN -2.745 -1.808 1993 1 0.739 3.734 0 0 0.786 3.781 0.978 2.369 1993 2 0.347 1.062 0 0 0.279 0.994 1.630 0.741 1993 3 3.595 1.334 0 0 3.388 1.127 4.668 0.803 1993 4 7.282 0.989 0 0 7.091 0.798 8.533 0.636 1993 5 11.348 0.259 0 0 11.207 0.118 13.098 0.405 1993 6 14.610 -1.786 1 0 NaN NaN 17.528 -0.472 1993 7 18.072 -1.352 1 0 NaN NaN 20.709 -0.319 1993 8 16.756 -1.220 0 0 16.402 -1.574 19.049 -0.531 1993 9 13.512 -1.056 0 0 13.254 -1.315 15.823 -0.349 1993 10 8.569 0.083 0 0 8.356 -0.131 9.752 -0.339 1993 11 2.363 0.514 0 0 2.204 0.355 2.575 -0.878 1993 12 -0.195 2.347 0 0 -0.219 2.323 -0.575 0.362 1994 1 -0.557 2.438 0 0 -0.510 2.485 -0.359 1.032 1994 2 -0.368 0.347 0 0 -0.436 0.279 0.378 -0.511 1994 3 3.721 1.460 0 0 3.514 1.253 5.159 1.294 1994 4 6.742 0.449 0 0 6.551 0.258 8.460 0.563 1994 5 10.716 -0.373 0 0 10.575 -0.514 12.632 -0.061 1994 6 NaN NaN NaN NaN NaN NaN 20.157 2.156 1994 7 18.832 -0.592 1 0 NaN NaN 21.697 0.668 1994 8 17.845 -0.131 0 0 17.491 -0.485 20.880 1.300 1994 9 14.512 -0.056 0 0 14.254 -0.315 16.700 0.527 1994 10 7.674 -0.812 0 0 7.461 -1.026 9.193 -0.898 1994 11 2.368 0.519 0 0 2.209 0.360 2.631 -0.823 1994 12 1.182 3.724 0 0 1.158 3.700 0.960 1.897 1995 1 -0.684 2.311 0 0 -0.637 2.358 -0.299 1.091 1995 2 4.043 4.758 0 0 3.975 4.690 4.507 3.617 1995 3 4.042 1.781 0 0 3.835 1.574 4.982 1.117 1995 4 5.173 -1.120 0 0 4.982 -1.311 6.760 -1.137 1995 5 9.068 -2.021 0 0 8.927 -2.162 10.790 -1.903 1995 6 14.488 -1.908 0 0 14.255 -2.142 16.561 -1.440 1995 7 18.466 -0.958 0 0 18.101 -1.323 20.912 -0.116 1995 8 18.285 0.309 0 0 17.931 -0.045 21.086 1.506 1995 9 14.538 -0.030 0 0 14.280 -0.289 17.047 0.875 1995 10 9.977 1.491 0 0 9.764 1.277 10.838 0.747 1995 11 6.128 4.279 0 0 5.969 4.120 6.253 2.800 1995 12 0.797 3.339 0 0 0.773 3.315 0.583 1.520 1996 1 0.845 3.840 0 0 0.892 3.887 0.673 2.063 1996 2 3.557 4.272 0 0 3.489 4.204 4.359 3.470 1996 3 2.985 0.724 0 0 2.778 0.517 4.239 0.373 1996 4 7.305 1.012 0 0 7.114 0.821 9.196 1.299 1996 5 13.856 2.767 0 0 13.715 2.626 15.348 2.655 1996 6 17.355 0.959 0 0 17.122 0.725 19.403 1.402 1996 7 19.079 -0.345 0 0 18.714 -0.710 22.236 1.207 1996 8 17.473 -0.503 0 0 17.119 -0.857 20.123 0.542 1996 9 12.933 -1.635 0 0 12.675 -1.894 15.129 -1.044 1996 10 8.229 -0.257 0 0 8.016 -0.471 9.983 -0.108 1996 11 3.533 1.684 0 0 3.374 1.525 4.358 0.904 1996 12 1.129 3.671 0 0 1.105 3.647 0.970 1.908 1997 1 -0.989 2.006 0 0 -0.942 2.053 -1.239 0.152 1997 2 -0.432 0.283 0 0 -0.500 0.215 1.031 0.142 1997 3 4.898 2.637 0 0 4.691 2.430 5.722 1.857 1997 4 5.455 -0.838 0 0 5.264 -1.029 7.289 -0.608 1997 5 12.569 1.480 0 0 12.428 1.339 14.267 1.574 1997 6 15.297 -1.099 0 0 15.064 -1.333 17.317 -0.684 1997 7 17.642 -1.782 0 0 17.277 -2.147 20.571 -0.457 1997 8 17.329 -0.647 0 0 16.975 -1.001 19.579 -0.002 1997 9 15.550 0.982 0 0 15.292 0.723 18.210 2.038 1997 10 7.644 -0.842 0 0 7.431 -1.056 9.707 -0.384 1997 11 4.182 2.333 0 0 4.023 2.174 4.363 0.910 1997 12 -3.203 -0.661 0 0 -3.227 -0.685 -2.665 -1.728 1998 1 0.395 3.390 0 0 0.442 3.437 0.636 2.027 1998 2 -1.809 -1.094 0 0 -1.877 -1.162 0.151 -0.738 1998 3 2.090 -0.171 0 0 1.883 -0.378 3.496 -0.370 1998 4 3.960 -2.333 0 0 3.769 -2.524 5.806 -2.091 1998 5 10.324 -0.765 0 0 10.183 -0.906 12.144 -0.549 1998 6 15.060 -1.336 0 0 14.827 -1.570 17.017 -0.984 1998 7 18.661 -0.763 0 0 18.296 -1.128 21.584 0.556 1998 8 17.852 -0.124 0 0 17.498 -0.478 20.210 0.630 1998 9 15.958 1.390 0 0 15.700 1.131 18.357 2.185 1998 10 9.185 0.699 0 0 8.972 0.485 10.628 0.537 1998 11 5.247 3.398 0 0 5.088 3.239 5.085 1.632 1998 12 0.634 3.176 0 0 0.610 3.152 0.460 1.397 1999 1 1.184 4.179 0 0 1.231 4.226 1.324 2.715 1999 2 2.427 3.142 0 0 2.359 3.074 3.003 2.114 1999 3 NaN NaN NaN NaN NaN NaN 6.155 2.290 1999 4 4.110 -2.183 0 4 4.187 -2.106 6.807 -1.091 1999 5 10.808 -0.281 0 0 10.865 -0.224 12.527 -0.166 1999 6 15.242 -1.154 0 0 15.336 -1.061 17.798 -0.203 1999 7 16.644 -2.780 0 0 16.791 -2.633 20.533 -0.496 1999 8 16.202 -1.774 0 0 16.344 -1.632 19.073 -0.508 1999 9 14.140 -0.428 0 0 14.244 -0.324 16.518 0.345 1999 10 9.752 1.266 0 0 9.838 1.351 11.005 0.914 1999 11 7.010 5.161 0 0 7.074 5.225 6.292 2.839 1999 12 -1.994 0.548 0 0 -1.984 0.557 -1.647 -0.710 2000 1 1.726 4.721 0 0 1.707 4.702 1.362 2.752 2000 2 2.647 3.362 0 0 2.674 3.390 3.499 2.610 2000 3 2.402 0.141 0 0 2.485 0.224 4.238 0.373 2000 4 8.550 2.257 0 0 8.627 2.334 10.402 2.505 2000 5 13.973 2.884 0 0 14.030 2.941 15.684 2.991 2000 6 16.772 0.376 0 0 16.866 0.469 19.564 1.563 2000 7 18.445 -0.979 0 0 18.592 -0.832 22.127 1.098 2000 8 17.063 -0.913 0 0 17.205 -0.771 20.249 0.669 2000 9 15.568 1.000 0 0 15.672 1.104 18.125 1.953 2000 10 7.823 -0.663 0 0 7.909 -0.578 10.345 0.254 2000 11 -0.520 -2.369 0 0 -0.456 -2.305 0.576 -2.877 2000 12 1.498 4.040 0 0 1.508 4.049 0.491 1.429 2001 1 -2.260 0.735 0 0 -2.279 0.716 -1.746 -0.355 2001 2 0.434 1.149 0 0 0.461 1.177 1.488 0.599 2001 3 3.231 0.970 0 0 3.314 1.053 4.688 0.823 2001 4 6.543 0.250 0 0 6.620 0.327 9.053 1.156 2001 5 12.613 1.524 0 0 12.670 1.581 14.698 2.005 2001 6 16.725 0.329 0 0 16.819 0.422 19.388 1.387 2001 7 17.129 -2.295 0 0 17.276 -2.148 21.535 0.506 2001 8 16.498 -1.478 0 0 16.640 -1.336 19.558 -0.022 2001 9 15.142 0.574 0 0 15.246 0.678 17.950 1.777 2001 10 10.345 1.859 0 0 10.431 1.944 12.195 2.105 2001 11 3.978 2.129 0 0 4.042 2.193 5.086 1.633 2001 12 -1.377 1.165 0 0 -1.367 1.174 -1.514 -0.577 2002 1 -0.726 2.269 0 0 -0.745 2.250 -0.490 0.900 2002 2 1.134 1.849 0 0 1.161 1.877 1.012 0.123 2002 3 2.063 -0.198 0 0 2.146 -0.115 3.507 -0.358 2002 4 9.347 3.054 0 0 9.424 3.131 11.313 3.416 2002 5 11.597 0.508 0 0 11.654 0.565 13.581 0.888 2002 6 18.593 2.197 0 0 18.687 2.290 20.233 2.232 2002 7 18.610 -0.814 0 0 18.757 -0.667 22.113 1.085 2002 8 17.332 -0.644 0 0 17.474 -0.502 20.355 0.775 2002 9 13.733 -0.835 0 0 13.837 -0.731 16.860 0.687 2002 10 7.616 -0.870 0 0 7.702 -0.785 9.986 -0.105 2002 11 3.895 2.046 0 0 3.959 2.110 4.448 0.994 2002 12 -1.492 1.050 0 0 -1.482 1.059 -1.449 -0.512 2003 1 3.389 6.384 0 0 3.370 6.365 3.197 4.588 2003 2 0.054 0.769 0 0 0.081 0.797 1.679 0.790 2003 3 2.485 0.224 0 0 2.568 0.307 3.788 -0.077 2003 4 5.707 -0.586 0 0 5.784 -0.509 7.772 -0.126 2003 5 12.323 1.234 0 0 12.380 1.291 14.101 1.408 2003 6 16.327 -0.069 0 0 16.421 0.024 18.490 0.489 2003 7 20.047 0.623 0 0 20.194 0.770 23.574 2.546 2003 8 16.973 -1.003 0 0 17.115 -0.861 20.689 1.108 2003 9 14.708 0.140 0 0 14.812 0.244 17.598 1.425 2003 10 10.945 2.459 0 0 11.031 2.544 13.310 3.219 2003 11 3.470 1.621 0 0 3.534 1.685 4.267 0.814 2003 12 0.402 2.944 0 0 0.412 2.953 0.391 1.328 2004 1 -0.526 2.469 0 0 -0.545 2.450 0.030 1.421 2004 2 -2.367 -1.652 0 0 -2.340 -1.624 -0.504 -1.393 2004 3 6.424 4.163 0 0 6.507 4.246 7.605 3.740 2004 4 5.760 -0.533 0 0 5.837 -0.456 8.036 0.138 2004 5 12.197 1.108 0 0 12.254 1.165 13.983 1.290 2004 6 15.830 -0.566 0 0 15.924 -0.473 18.320 0.319 2004 7 17.320 -2.104 0 0 17.467 -1.957 20.983 -0.046 2004 8 15.522 -2.454 0 0 15.664 -2.312 18.819 -0.762 2004 9 13.613 -0.955 0 0 13.717 -0.851 16.091 -0.082 2004 10 7.739 -0.747 0 0 7.825 -0.662 10.034 -0.056 2004 11 1.965 0.116 0 0 2.029 0.180 3.570 0.117 2004 12 0.576 3.118 0 0 0.586 3.127 -0.203 0.734 2005 1 0.934 3.929 0 0 0.915 3.910 2.414 3.805 2005 2 0.884 1.599 0 0 0.911 1.627 2.614 1.725 2005 3 1.845 -0.416 0 0 1.928 -0.333 3.694 -0.171 2005 4 6.398 0.105 0 0 6.475 0.182 8.583 0.686 2005 5 12.156 1.067 0 0 12.213 1.124 13.945 1.251 2005 6 15.375 -1.021 0 0 15.469 -0.928 17.737 -0.264 2005 7 19.061 -0.363 0 0 19.208 -0.216 22.398 1.370 2005 8 15.855 -2.121 0 0 15.997 -1.979 19.317 -0.264 2005 9 14.555 -0.013 0 0 14.659 0.091 17.782 1.609 2005 10 9.097 0.611 0 0 9.183 0.696 11.475 1.384 2005 11 4.598 2.749 0 0 4.662 2.813 5.000 1.547 2005 12 0.850 3.392 0 0 0.860 3.401 0.436 1.373 2006 1 0.160 3.155 0 0 0.141 3.136 0.554 1.945 2006 2 2.252 2.967 0 0 2.279 2.995 2.323 1.434 2006 3 1.929 -0.332 0 0 2.012 -0.249 3.358 -0.507 2006 4 8.342 2.049 1 0 NaN NaN 9.803 1.906 2006 5 12.861 1.772 0 0 12.918 1.829 15.096 2.403 2006 6 18.052 1.656 0 0 18.146 1.749 20.448 2.447 2006 7 18.532 -0.892 0 0 18.679 -0.745 22.380 1.352 2006 8 15.700 -2.276 0 0 15.842 -2.134 18.893 -0.687 2006 9 11.793 -2.775 0 0 11.897 -2.671 14.613 -1.560 2006 10 7.634 -0.852 0 0 7.720 -0.767 9.831 -0.260 2006 11 5.038 3.189 0 0 5.102 3.253 4.797 1.343 2006 12 -0.111 2.431 0 0 -0.101 2.440 -1.241 -0.303 2007 1 -2.253 0.742 0 0 -2.272 0.723 -2.522 -1.132 2007 2 0.666 1.381 0 0 0.693 1.409 1.510 0.621 2007 3 4.474 2.213 0 0 4.557 2.296 5.487 1.622 2007 4 7.193 0.900 0 0 7.270 0.977 8.947 1.050 2007 5 11.461 0.372 0 0 11.518 0.429 13.359 0.666 2007 6 17.077 0.681 0 0 17.171 0.774 19.300 1.300 2007 7 18.816 -0.608 0 0 18.963 -0.461 22.076 1.048 2007 8 17.619 -0.357 0 0 17.761 -0.215 20.685 1.105 2007 9 14.982 0.414 0 0 15.086 0.518 17.596 1.423 2007 10 9.706 1.220 0 0 9.792 1.305 11.126 1.035 2007 11 6.613 4.764 0 0 6.677 4.828 6.604 3.150 2007 12 -2.163 0.379 0 0 -2.153 0.388 -1.239 -0.301 2008 1 -2.152 0.843 0 0 -2.171 0.824 -2.215 -0.824 2008 2 1.145 1.860 0 0 1.172 1.888 1.284 0.395 2008 3 3.235 0.974 0 0 3.318 1.057 4.166 0.301 2008 4 6.415 0.122 0 0 6.492 0.199 8.178 0.280 2008 5 9.297 -1.792 0 0 9.354 -1.735 11.710 -0.983 2008 6 16.953 0.557 0 0 17.047 0.650 18.968 0.968 2008 7 17.476 -1.948 0 0 17.623 -1.801 21.190 0.161 2008 8 17.071 -0.905 0 0 17.213 -0.763 20.190 0.609 2008 9 13.857 -0.711 0 0 13.961 -0.607 16.665 0.493 2008 10 9.189 0.703 0 0 9.275 0.788 10.504 0.413 2008 11 4.790 2.941 0 0 4.854 3.005 4.952 1.498 2008 12 0.911 3.453 0 0 0.921 3.462 0.302 1.239 2009 1 0.948 3.943 0 0 0.929 3.924 0.795 2.185 2009 2 2.263 2.978 0 0 2.290 3.006 2.603 1.714 2009 3 4.115 1.854 0 0 4.198 1.937 5.159 1.293 2009 4 5.787 -0.506 0 0 5.864 -0.429 7.825 -0.072 2009 5 12.979 1.890 0 0 13.036 1.947 14.855 2.162 2009 6 14.413 -1.983 0 0 14.507 -1.890 17.070 -0.930 2009 7 18.800 -0.624 0 0 18.947 -0.477 22.490 1.461 2009 8 17.994 0.018 0 0 18.136 0.160 20.235 0.654 2009 9 13.417 -1.151 0 0 13.521 -1.047 16.353 0.181 2009 10 7.018 -1.468 0 0 7.104 -1.383 9.560 -0.531 2009 11 5.140 3.291 0 0 5.204 3.355 4.822 1.368 2009 12 -2.597 -0.055 0 0 -2.587 -0.046 -2.778 -1.841 2010 1 -0.383 2.612 0 0 -0.402 2.593 -1.529 -0.139 2010 2 -2.005 -1.290 0 0 -1.978 -1.262 -0.039 -0.928 2010 3 1.645 -0.616 0 0 1.728 -0.533 3.395 -0.470 2010 4 5.917 -0.376 0 0 5.994 -0.299 8.192 0.294 2010 5 9.858 -1.231 0 0 9.915 -1.174 11.992 -0.701 2010 6 16.365 -0.031 0 0 16.459 0.062 18.870 0.869 2010 7 17.865 -1.559 0 0 18.012 -1.412 21.816 0.788 2010 8 17.074 -0.902 0 0 17.216 -0.760 19.832 0.252 2010 9 15.982 1.414 0 0 16.086 1.518 18.262 2.090 2010 10 9.648 1.162 0 0 9.734 1.247 11.662 1.571 2010 11 1.685 -0.164 0 0 1.749 -0.100 2.485 -0.969 2010 12 2.839 5.381 0 0 2.849 5.390 2.681 3.618 2011 1 -1.415 1.580 0 0 -1.434 1.561 -2.170 -0.779 2011 2 -2.163 -1.448 0 0 -2.136 -1.420 -0.761 -1.650 2011 3 5.360 3.099 0 0 5.443 3.182 6.085 2.220 2011 4 7.117 0.824 0 0 7.194 0.901 9.442 1.544 2011 5 9.508 -1.581 0 0 9.565 -1.524 11.479 -1.214 2011 6 17.263 0.867 0 0 17.357 0.960 18.959 0.958 2011 7 18.432 -0.992 0 0 18.579 -0.845 22.014 0.985 2011 8 18.294 0.318 0 0 18.436 0.460 21.431 1.851 2011 9 14.613 0.045 0 0 14.717 0.149 17.246 1.074 2011 10 9.085 0.599 0 0 9.171 0.684 10.567 0.476 2011 11 3.462 1.613 0 0 3.526 1.677 3.962 0.509 2011 12 -2.182 0.360 0 0 -2.172 0.369 -2.125 -1.188 2012 1 0.950 3.945 0 0 0.931 3.926 1.093 2.484 2012 2 0.453 1.168 0 0 0.480 1.196 1.441 0.552 2012 3 3.745 1.484 0 0 3.828 1.567 4.771 0.906 2012 4 8.772 2.479 0 0 8.849 2.556 10.327 2.429 2012 5 12.992 1.903 0 0 13.049 1.960 14.450 1.756 2012 6 18.623 2.227 0 0 18.717 2.320 20.490 2.490 2012 7 18.087 -1.337 0 0 18.234 -1.190 21.614 0.585 2012 8 18.050 0.074 0 0 18.192 0.216 20.780 1.199 2012 9 14.413 -0.155 0 0 14.517 -0.051 17.176 1.003 2012 10 10.100 1.614 0 0 10.186 1.699 11.426 1.336 2012 11 5.627 3.778 0 0 5.691 3.842 5.485 2.032 2012 12 -0.390 2.152 0 0 -0.380 2.161 -0.256 0.682 2013 1 -3.397 -0.402 0 0 -3.416 -0.421 -3.405 -2.014 2013 2 -2.429 -1.714 0 0 -2.402 -1.686 -0.703 -1.592 2013 3 4.716 2.455 0 0 4.799 2.538 5.786 1.921 2013 4 6.858 0.565 0 0 6.935 0.642 8.943 1.046 2013 5 11.635 0.546 0 0 11.692 0.603 13.278 0.585 2013 6 18.772 2.376 0 0 18.866 2.469 20.408 2.407 2013 7 17.806 -1.618 0 0 17.953 -1.471 21.681 0.653 2013 8 16.677 -1.299 0 0 16.819 -1.157 19.689 0.108 2013 9 14.163 -0.405 0 0 14.267 -0.301 16.793 0.620 2013 10 7.682 -0.804 0 0 7.768 -0.719 9.091 -1.000 2013 11 4.350 2.501 1 0 NaN NaN NaN NaN